(TCPMUX)
Registered Ports >> Registered Ports
Registered Ports (Numbers 1024 to 49151) – These port numbers are assigned to user processes or applications. These processes are primarily individual applications that a user has chosen to install rather than common applications that would receive a Well Known Port. When not used for a server resource, these ports may also be used dynamically selected by a client as its source port.
Port number | Protocol | Description | Status | |
1024 | TCP | UDP | The Internet Assigned Numbers Authority (IANA) port number reserver | Port is officialy registered by IANA for this application |
1025 | TCP | NFS or IIS or Teradata | Port is not officialy registered by IANA for this application | |
1026 | TCP | Often used by Microsoft DCOM services | Port is not officialy registered by IANA for this application | |
1029 | TCP | Often used by Microsoft DCOM services | Port is not officialy registered by IANA for this application | |
1058 | TCP | UDP | nim, IBM AIX Network Installation Manager (NIM) | Port is officialy registered by IANA for this application |
1059 | TCP | UDP | nimreg, IBM AIX Network Installation Manager (NIM) | Port is officialy registered by IANA for this application |
1080 | TCP | SOCKS proxy | Port is officialy registered by IANA for this application | |
1085 | TCP | UDP | WebObjects | Port is officialy registered by IANA for this application |
1098 | TCP | UDP | rmiactivation, RMI Activation | Port is officialy registered by IANA for this application |
1099 | TCP | UDP | rmiregistry, RMI Registry | Port is officialy registered by IANA for this application |
1109 | UDP | The Internet Assigned Numbers Authority (IANA) port number reserver | Port is officialy registered by IANA for this application | |
1109 | TCP | The Internet Assigned Numbers Authority (IANA) port number reserver | Port is officialy registered by IANA for this application | |
1109 | TCP | Kerberos Post Office Protocol (KPOP) | Port is not officialy registered by IANA for this application | |
1110 | UDP | EasyBits School network discovery protocol (for Intel’s CMPC platform) | Port is not officialy registered by IANA for this application | |
1140 | TCP | UDP | AutoNOC protocol | Port is officialy registered by IANA for this application |
1167 | UDP | phone, conference calling | Port is not officialy registered by IANA for this application | |
1169 | TCP | UDP | Tripwire | Port is officialy registered by IANA for this application |
1176 | TCP | Perceptive Automation Indigo Home automation server | Port is officialy registered by IANA for this application | |
1182 | TCP | UDP | AcceleNet Intelligent Transfer Protocol | Port is officialy registered by IANA for this application |
1194 | TCP | UDP | OpenVPN | Port is officialy registered by IANA for this application |
1198 | TCP | UDP | The cajo project Free dynamic transparent distributed computing in Java | Port is officialy registered by IANA for this application |
1200 | TCP | scol, protocol used by SCOL 3D virtual worlds server to answer world name resolution client request 39 | Port is officialy registered by IANA for this application | |
1200 | UDP | scol, protocol used by SCOL 3D virtual worlds server to answer world name resolution client request | Port is officialy registered by IANA for this application | |
1200 | UDP | Steam Friends Applet | Port is not officialy registered by IANA for this application | |
1214 | TCP | Kazaa | Port is officialy registered by IANA for this application | |
1217 | TCP | Uvora Online | Port is not officialy registered by IANA for this application | |
1220 | TCP | QuickTime Streaming Server administration | Port is officialy registered by IANA for this application | |
1223 | TCP | UDP | TGP, TrulyGlobal Protocol, also known as “The Gur Protocol” (named for Gur Kimchi of TrulyGlobal) | Port is officialy registered by IANA for this application |
1234 | UDP | VLC media player Default port for UDP/RTP stream | Port is not officialy registered by IANA for this application | |
1236 | TCP | Symantec BindView Control UNIX Default port for TCP management server connections | Port is not officialy registered by IANA for this application | |
1241 | TCP | UDP | Nessus Security Scanner | Port is officialy registered by IANA for this application |
1270 | TCP | UDP | Microsoft System Center Operations Manager (SCOM) (formerly Microsoft Operations Manager (MOM)) agent | Port is officialy registered by IANA for this application |
1293 | TCP | UDP | IPSec (Internet Protocol Security) | Port is officialy registered by IANA for this application |
1301 | TCP | Palmer Performance OBDNet | Port is not officialy registered by IANA for this application | |
1309 | TCP | Altera Quartus jtagd | Port is not officialy registered by IANA for this application | |
1311 | TCP | Dell OpenManage HTTPS | Port is officialy registered by IANA for this application | |
1313 | TCP | Xbiim (Canvii server) | Port is not officialy registered by IANA for this application | |
1319 | TCP | AMX ICSP | Port is officialy registered by IANA for this application | |
1319 | UDP | AMX ICSP | Port is officialy registered by IANA for this application | |
1337 | UDP | Men and Mice DNS | Port is officialy registered by IANA for this application | |
1337 | TCP | Men and Mice DNS | Port is officialy registered by IANA for this application | |
1337 | TCP | PowerFolder P2P Encrypted File Synchronization Program | Port is not officialy registered by IANA for this application | |
1337 | TCP | WASTE Encrypted File Sharing Program | Port is not officialy registered by IANA for this application | |
1344 | TCP | Internet Content Adaptation Protocol | Port is officialy registered by IANA for this application | |
1352 | TCP | IBM Lotus Notes/Domino 40 (RPC) protocol | Port is officialy registered by IANA for this application | |
1387 | TCP | UDP | cadsi-lm, LMS International (formerly Computer Aided Design Software, Inc. (CADSI)) LM | Port is officialy registered by IANA for this application |
1414 | TCP | IBM WebSphere MQ (formerly known as MQSeries) | Port is officialy registered by IANA for this application | |
1417 | TCP | UDP | Timbuktu Service 1 Port | Port is officialy registered by IANA for this application |
1418 | TCP | UDP | Timbuktu Service 2 Port | Port is officialy registered by IANA for this application |
1419 | TCP | UDP | Timbuktu Service 3 Port | Port is officialy registered by IANA for this application |
1420 | TCP | UDP | Timbuktu Service 4 Port | Port is officialy registered by IANA for this application |
1431 | TCP | Reverse Gossip Transport Protocol (RGTP), used to access a General-purpose Reverse-Ordered Gossip Gathering System (GROGGS) bulletin board, such as that implemented on the Cambridge University’s Phoenix system | Port is officialy registered by IANA for this application | |
1433 | TCP | MSSQL (Microsoft SQL Server database management system) Server | Port is officialy registered by IANA for this application | |
1434 | TCP | UDP | MSSQL (Microsoft SQL Server database management system) Monitor | Port is officialy registered by IANA for this application |
1470 | TCP | Solarwinds Kiwi Log Server | Port is officialy registered by IANA for this application | |
1494 | TCP | Citrix XenApp Independent Computing Architecture (ICA) thin client protocol | Port is officialy registered by IANA for this application | |
1500 | TCP | NetGuard GuardianPro firewall (NT4-based) Remote Management | Port is not officialy registered by IANA for this application | |
1501 | UDP | NetGuard GuardianPro firewall (NT4-based) Authentication Client | Port is not officialy registered by IANA for this application | |
1503 | TCP | UDP | Windows Live Messenger (Whiteboard and Application Sharing) | Port is not officialy registered by IANA for this application |
1512 | TCP | UDP | Microsoft Windows Internet Name Service (WINS) | Port is officialy registered by IANA for this application |
1513 | TCP | UDP | Garena Garena Gaming Client | Port is officialy registered by IANA for this application |
1521 | TCP | nCube License Manager | Port is officialy registered by IANA for this application | |
1521 | TCP | Oracle database default listener, in future releases official port 2483 | Port is not officialy registered by IANA for this application | |
1524 | TCP | UDP | ingreslock, ingres | Port is officialy registered by IANA for this application |
1526 | TCP | Oracle database common alternative for listener | Port is not officialy registered by IANA for this application | |
1527 | TCP | Apache Derby Network Server default port | Port is not officialy registered by IANA for this application | |
1533 | TCP | IBM Sametime IM—Virtual Places Chat Microsoft SQL Server | Port is officialy registered by IANA for this application | |
1534 | UDP | Eclipse Target Communication Framework (TCF) agent discovery 41 | Port is not officialy registered by IANA for this application | |
1547 | TCP | UDP | Laplink | Port is officialy registered by IANA for this application |
1550 | TCP | UDP | 3m-image-lm Image Storage license manager 3M Company | Port is officialy registered by IANA for this application |
1550 | Gadu-Gadu (direct client-to-client) | Port is not officialy registered by IANA for this application | ||
1556 | TCP | Jeex-RB (direct client-to-db.service) | Port is not officialy registered by IANA for this application | |
1581 | UDP | MIL STD 2045-47001 VMF | Port is officialy registered by IANA for this application | |
1589 | UDP | Cisco VQP (VLAN Query Protocol) / VMPS | Port is not officialy registered by IANA for this application | |
1590 | TCP | GE Smallworld Datastore Server (SWMFS/Smallworld Master Filesystem) | Port is not officialy registered by IANA for this application | |
1627 | iSketch | Port is not officialy registered by IANA for this application | ||
1645 | TCP | UDP | radius auth, RADIUS authentication protocol (default for Cisco and Juniper Networks RADIUS servers) | Port is not officialy registered by IANA for this application |
1646 | TCP | UDP | radius acct, RADIUS authentication protocol (default for Cisco and Juniper Networks RADIUS servers) | Port is not officialy registered by IANA for this application |
1666 | TCP | Perforce | Port is not officialy registered by IANA for this application | |
1677 | TCP | UDP | Novell GroupWise clients in client/server access mode | Port is officialy registered by IANA for this application |
1688 | TCP | Microsoft Key Management Service for KMS Windows Activation | Port is not officialy registered by IANA for this application | |
1700 | UDP | Cisco RADIUS Change of Authorization for TrustSec | Port is not officialy registered by IANA for this application | |
1701 | UDP | Layer 2 Forwarding Protocol (L2F) & Layer 2 Tunneling Protocol (L2TP) | Port is officialy registered by IANA for this application | |
1707 | TCP | UDP | Windward Studios | Port is officialy registered by IANA for this application |
1707 | TCP | Romtoc Packet Protocol (L2F) & Layer 2 Tunneling Protocol (L2TP) | Port is not officialy registered by IANA for this application | |
1716 | TCP | America’s Army Massively multiplayer online game (MMO) | Port is not officialy registered by IANA for this application | |
1719 | UDP | H.323 Registration and alternate communication | Port is officialy registered by IANA for this application | |
1720 | TCP | H.323 Call signalling | Port is officialy registered by IANA for this application | |
1723 | TCP | UDP | Microsoft Point-to-Point Tunneling Protocol (PPTP) | Port is officialy registered by IANA for this application |
1725 | UDP | Valve Steam Client | Port is not officialy registered by IANA for this application | |
1755 | TCP | UDP | Microsoft Media Services (MMS, ms-streaming) | Port is officialy registered by IANA for this application |
1761 | UDP | cft-0 | Port is officialy registered by IANA for this application | |
1761 | TCP | cft-0 | Port is officialy registered by IANA for this application | |
1761 | TCP | Novell Zenworks Remote Control utility | Port is not officialy registered by IANA for this application | |
1762–1768 | TCP | UDP | cft-1 to cft-7 | Port is officialy registered by IANA for this application |
1792 | TCP | UDP | Moby | Port is not officialy registered by IANA for this application |
1801 | TCP | UDP | Microsoft Message Queuing | Port is officialy registered by IANA for this application |
1812 | TCP | UDP | radius, RADIUS authentication protocol | Port is officialy registered by IANA for this application |
1813 | TCP | UDP | radacct, RADIUS accounting protocol | Port is officialy registered by IANA for this application |
1863 | TCP | MSNP (Microsoft Notification Protocol), used by the .NET Messenger Service and a number of Instant Messaging clients | Port is officialy registered by IANA for this application | |
1883 | TCP | UDP | MQ Telemetry Transport (MQTT), formerly known as MQIsdp (MQSeries SCADA protocol) | Port is officialy registered by IANA for this application |
1886 | TCP | Leonardo over IP Pro2col Ltd | Port is not officialy registered by IANA for this application | |
1900 | UDP | Microsoft SSDP Enables discovery of UPnP devices | Port is officialy registered by IANA for this application | |
1920 | TCP | IBM Tivoli Monitoring Console (https) | Port is not officialy registered by IANA for this application | |
1935 | TCP | Adobe Systems Macromedia Flash Real Time Messaging Protocol (RTMP) “plain” protocol | Port is officialy registered by IANA for this application | |
1947 | TCP | UDP | SentinelSRM (hasplm), Aladdin HASP License Manager | Port is officialy registered by IANA for this application |
1967 | UDP | Cisco IOS IP Service Level Agreements (IP SLAs) Control Protocol | Port is not officialy registered by IANA for this application | |
1970 | TCP | UDP | Netop Business Solutions Netop Remote Control | Port is officialy registered by IANA for this application |
1971 | TCP | UDP | Netop Business Solutions Netop School | Port is officialy registered by IANA for this application |
1972 | TCP | UDP | InterSystems Caché | Port is officialy registered by IANA for this application |
1975–1977 | UDP | Cisco TCO (Documentation) | Port is officialy registered by IANA for this application | |
1984 | TCP | Big Brother and related Xymon (formerly Hobbit) System and Network Monitor | Port is officialy registered by IANA for this application | |
1985 | UDP | Cisco HSRP | Port is officialy registered by IANA for this application | |
1994 | TCP | UDP | Cisco STUN-SDLC (Serial Tunneling—Synchronous Data Link Control) protocol | Port is officialy registered by IANA for this application |
1997 | TCP | Chizmo Networks Transfer Tool | Port is not officialy registered by IANA for this application | |
1998 | TCP | UDP | Cisco X.25 over TCP (XOT) service | Port is officialy registered by IANA for this application |
2000 | TCP | UDP | Cisco SCCP (Skinny) | Port is officialy registered by IANA for this application |
2001 | UDP | CAPTAN Test Stand System | Port is not officialy registered by IANA for this application | |
2002 | TCP | Secure Access Control Server (ACS) for Windows | Port is not officialy registered by IANA for this application | |
2030 | Oracle Services for Microsoft Transaction Server | Port is not officialy registered by IANA for this application | ||
2031 | TCP | UDP | mobrien-chat(http://chat.mobrien.com:2031) | Port is officialy registered by IANA for this application |
2041 | TCP | Mail.Ru Agent communication protocol | Port is not officialy registered by IANA for this application | |
2049 | UDP | Network File System | Port is officialy registered by IANA for this application | |
2049 | UDP | shilp | Port is officialy registered by IANA for this application | |
2053 | TCP | knetd Kerberos de-multiplexor | Port is not officialy registered by IANA for this application | |
2056 | UDP | Civilization 4 multiplayer | Port is not officialy registered by IANA for this application | |
2074 | TCP | UDP | Vertel VMF SA (i.e. App.. SpeakFreely) | Port is officialy registered by IANA for this application |
2082 | TCP | Infowave Mobility Server | Port is officialy registered by IANA for this application | |
2082 | TCP | CPanel default | Port is not officialy registered by IANA for this application | |
2083 | TCP | Secure Radius Service (radsec) | Port is officialy registered by IANA for this application | |
2083 | TCP | CPanel default SSL | Port is not officialy registered by IANA for this application | |
2086 | TCP | GNUnet | Port is officialy registered by IANA for this application | |
2086 | TCP | WebHost Manager default | Port is not officialy registered by IANA for this application | |
2087 | TCP | WebHost Manager default SSL | Port is not officialy registered by IANA for this application | |
2095 | TCP | CPanel default Web mail | Port is not officialy registered by IANA for this application | |
2096 | TCP | CPanel default SSL Web mail | Port is not officialy registered by IANA for this application | |
2102 | TCP | UDP | zephyr-srv Project Athena Zephyr Notification Service server | Port is officialy registered by IANA for this application |
2103 | TCP | UDP | zephyr-clt Project Athena Zephyr Notification Service serv-hm connection | Port is officialy registered by IANA for this application |
2104 | TCP | UDP | zephyr-hm Project Athena Zephyr Notification Service hostmanager | Port is officialy registered by IANA for this application |
2105 | TCP | UDP | IBM MiniPay | Port is officialy registered by IANA for this application |
2105 | TCP | UDP | eklogin Kerberos encrypted remote login (rlogin) | Port is not officialy registered by IANA for this application |
2105 | TCP | UDP | zephyr-hm-srv Project Athena Zephyr Notification Service hm-serv connection (should use port 2102) | Port is not officialy registered by IANA for this application |
2121 | TCP | FTP proxy | Port is not officialy registered by IANA for this application | |
2144 | TCP | Iron Mountain LiveVault Agent | Port is not officialy registered by IANA for this application | |
2145 | TCP | Iron Mountain LiveVault Agent | Port is not officialy registered by IANA for this application | |
2156 | UDP | Talari Reliable Protocol | Port is officialy registered by IANA for this application | |
2160 | TCP | APC Agent | Port is officialy registered by IANA for this application | |
2161 | TCP | APC Agent | Port is officialy registered by IANA for this application | |
2181 | TCP | UDP | EForward-document transport system | Port is officialy registered by IANA for this application |
2190 | UDP | TiVoConnect Beacon | Port is not officialy registered by IANA for this application | |
2200 | UDP | Tuxanci game server 42 | Port is not officialy registered by IANA for this application | |
2210 | UDP | NOAAPORT Broadcast Network | Port is officialy registered by IANA for this application | |
2210 | TCP | NOAAPORT Broadcast Network | Port is officialy registered by IANA for this application | |
2210 | TCP | MikroTik Remote management for “The Dude” | Port is not officialy registered by IANA for this application | |
2211 | UDP | EMWIN | Port is officialy registered by IANA for this application | |
2211 | TCP | EMWIN | Port is officialy registered by IANA for this application | |
2211 | TCP | MikroTik Secure management for “The Dude” | Port is not officialy registered by IANA for this application | |
2212 | UDP | LeeCO POS Server Service | Port is officialy registered by IANA for this application | |
2212 | TCP | LeeCO POS Server Service | Port is officialy registered by IANA for this application | |
2212 | TCP | Port-A-Pour Remote WinBatch | Port is not officialy registered by IANA for this application | |
2219 | TCP | UDP | NetIQ NCAP Protocol | Port is officialy registered by IANA for this application |
2220 | TCP | UDP | NetIQ End2End | Port is officialy registered by IANA for this application |
2221 | TCP | ESET Anti-virus updates | Port is not officialy registered by IANA for this application | |
2222 | TCP | DirectAdmin default & ESET Remote Administration | Port is not officialy registered by IANA for this application | |
2223 | UDP | Microsoft Office OS X antipiracy network monitor | Port is not officialy registered by IANA for this application | |
2261 | TCP | UDP | CoMotion Master | Port is officialy registered by IANA for this application |
2262 | TCP | UDP | CoMotion Backup | Port is officialy registered by IANA for this application |
2301 | TCP | HP System Management Redirect to port 2381 | Port is not officialy registered by IANA for this application | |
2302 | UDP | ArmA multiplayer (default for game) | Port is not officialy registered by IANA for this application | |
2302 | UDP | Halo: Combat Evolved multiplayer | Port is not officialy registered by IANA for this application | |
2303 | UDP | ArmA multiplayer (default for server reporting) (default port for game +1) | Port is not officialy registered by IANA for this application | |
2305 | UDP | ArmA multiplayer (default for VoN) (default port for game +3) | Port is not officialy registered by IANA for this application | |
2323 | TCP | Philips TVs based on jointSPACE 43 | Port is not officialy registered by IANA for this application | |
2369 | TCP | Default for BMC Software Control-M/Server—Configuration Agent, though often changed during installation | Port is officialy registered by IANA for this application | |
2370 | TCP | Default for BMC Software Control-M/Server—to allow the Control-M/Enterprise Manager to connect to the Control-M/Server, though often changed during installation | Port is officialy registered by IANA for this application | |
2379 | TCP | KGS Go Server | Port is not officialy registered by IANA for this application | |
2381 | TCP | HP Insight Manager default for Web server | Port is not officialy registered by IANA for this application | |
2401 | TCP | CVS version control system | Port is not officialy registered by IANA for this application | |
2404 | TCP | IEC 60870-5 -104, used to send electric power telecontrol messages between two systems via directly connected data circuits | Port is officialy registered by IANA for this application | |
2420 | UDP | Westell Remote Access | Port is officialy registered by IANA for this application | |
2427 | UDP | Cisco MGCP | Port is officialy registered by IANA for this application | |
2447 | TCP | UDP | ovwdb—OpenView Network Node Manager (NNM) daemon | Port is officialy registered by IANA for this application |
2483 | TCP | UDP | Oracle database listening for unsecure client connections to the listener, replaces port 1521 | Port is officialy registered by IANA for this application |
2484 | TCP | UDP | Oracle database listening for SSL client connections to the listener | Port is officialy registered by IANA for this application |
2500 | TCP | THEÒSMESSENGER listening for TheòsMessenger client connections | Port is officialy registered by IANA for this application | |
2501 | TCP | TheosNet-Admin listening for TheòsMessenger client connections | Port is officialy registered by IANA for this application | |
2518 | TCP | UDP | Willy | Port is officialy registered by IANA for this application |
2525 | TCP | SMTP alternate | Port is not officialy registered by IANA for this application | |
2535 | TCP | MADCAP | Port is officialy registered by IANA for this application | |
2546 | TCP | UDP | EVault—Data Protection Services | Port is not officialy registered by IANA for this application |
2593 | TCP | UDP | RunUO—Ultima Online server | Port is not officialy registered by IANA for this application |
2598 | TCP | new ICA (Citrix) —when Session Reliability is enabled, TCP port 2598 replaces port 1494 | Port is not officialy registered by IANA for this application | |
2599 | TCP | SonicWALL Antispam traffic between Remote Analyzer (RA) and Control Center (CC) | Port is not officialy registered by IANA for this application | |
2610 | TCP | Dark Ages | Port is not officialy registered by IANA for this application | |
2612 | TCP | UDP | QPasa from MQSoftware | Port is officialy registered by IANA for this application |
2638 | TCP | Sybase database listener | Port is not officialy registered by IANA for this application | |
2636 | TCP | Solve Service | Port is officialy registered by IANA for this application | |
2641 | TCP | UDP | HDL Server from CNRI | Port is officialy registered by IANA for this application |
2642 | TCP | UDP | Tragic | Port is officialy registered by IANA for this application |
2698 | TCP | UDP | Citel / MCK IVPIP | Port is officialy registered by IANA for this application |
2700–2800 | TCP | KnowShowGo P2P | Port is officialy registered by IANA for this application | |
2710 | TCP | XBT Bittorrent Tracker | Port is not officialy registered by IANA for this application | |
2710 | UDP | XBT Bittorrent Tracker experimental UDP tracker extension | Port is not officialy registered by IANA for this application | |
2710 | TCP | Knuddels.de | Port is not officialy registered by IANA for this application | |
2735 | TCP | UDP | NetIQ Monitor Console | Port is officialy registered by IANA for this application |
2809 | TCP | corbaloc:iiop URL, per the CORBA 3.0.3 specification | Port is officialy registered by IANA for this application | |
2809 | TCP | IBM WebSphere Application Server (WAS) Bootstrap/rmi default | Port is not officialy registered by IANA for this application | |
2809 | UDP | corbaloc:iiop URL, per the CORBA 3.0.3 specification. | Port is officialy registered by IANA for this application | |
2868 | TCP | UDP | Norman Proprietary Event Protocol NPEP | Port is officialy registered by IANA for this application |
2944 | UDP | Megaco Text H.248 | Port is not officialy registered by IANA for this application | |
2945 | UDP | Megaco Binary (ASN.1) H.248 | Port is not officialy registered by IANA for this application | |
2947 | TCP | gpsd GPS daemon | Port is officialy registered by IANA for this application | |
2948 | TCP | UDP | WAP-push Multimedia Messaging Service (MMS) | Port is officialy registered by IANA for this application |
2949 | TCP | UDP | WAP-pushsecure Multimedia Messaging Service (MMS) | Port is officialy registered by IANA for this application |
2967 | TCP | Symantec AntiVirus Corporate Edition | Port is not officialy registered by IANA for this application | |
3000 | TCP | Miralix License server | Port is not officialy registered by IANA for this application | |
3000 | TCP | Cloud9 Integrated Development Environment server | Port is not officialy registered by IANA for this application | |
3000 | UDP | Distributed Interactive Simulation (DIS), modifiable default | Port is not officialy registered by IANA for this application | |
3000 | TCP | Ruby on Rails development default 44 | Port is not officialy registered by IANA for this application | |
3001 | TCP | Miralix Phone Monitor | Port is not officialy registered by IANA for this application | |
3001 | TCP | Opsware server (Satellite) | Port is not officialy registered by IANA for this application | |
3002 | TCP | Miralix CSTA | Port is not officialy registered by IANA for this application | |
3003 | TCP | Miralix GreenBox API | Port is not officialy registered by IANA for this application | |
3004 | TCP | Miralix InfoLink | Port is not officialy registered by IANA for this application | |
3005 | TCP | Miralix TimeOut | Port is not officialy registered by IANA for this application | |
3006 | TCP | Miralix SMS Client Connector | Port is not officialy registered by IANA for this application | |
3007 | TCP | Miralix OM Server | Port is not officialy registered by IANA for this application | |
3008 | TCP | Miralix Proxy | Port is not officialy registered by IANA for this application | |
3017 | TCP | Miralix IVR and Voicemail | Port is not officialy registered by IANA for this application | |
3025 | TCP | netpd.org | Port is not officialy registered by IANA for this application | |
3030 | TCP | UDP | NetPanzer | Port is not officialy registered by IANA for this application |
3050 | TCP | UDP | gds_db (Interbase/Firebird) | Port is officialy registered by IANA for this application |
3051 | TCP | UDP | Galaxy Server (Gateway Ticketing Systems) | Port is officialy registered by IANA for this application |
3052 | TCP | UDP | APC PowerChute Network 45 | Port is officialy registered by IANA for this application |
3074 | TCP | UDP | Xbox LIVE and/or Games for Windows – LIVE | Port is officialy registered by IANA for this application |
3100 | TCP | HTTP used by Tatsoft as the default listen port | Port is not officialy registered by IANA for this application | |
3101 | TCP | BlackBerry Enterprise Server communication to cloud | Port is not officialy registered by IANA for this application | |
3128 | TCP | HTTP used by Web caches and the default for the Squid (software) | Port is not officialy registered by IANA for this application | |
3128 | TCP | HTTP used by Tatsoft as the default client connection | Port is not officialy registered by IANA for this application | |
3225 | TCP | UDP | FCIP (Fiber Channel over Internet Protocol) | Port is officialy registered by IANA for this application |
3233 | TCP | UDP | WhiskerControl research control protocol | Port is officialy registered by IANA for this application |
3235 | TCP | UDP | Galaxy Network Service (Gateway Ticketing Systems) | Port is officialy registered by IANA for this application |
3260 | TCP | iSCSI target | Port is officialy registered by IANA for this application | |
3268 | TCP | UDP | msft-gc, Microsoft Global Catalog (LDAP service which contains data from Active Directory forests) | Port is officialy registered by IANA for this application |
3269 | TCP | UDP | msft-gc-ssl, Microsoft Global Catalog over SSL (similar to port 3268, LDAP over SSL) | Port is officialy registered by IANA for this application |
3283 | TCP | Apple Remote Desktop reporting (officially Net Assistant, referring to an earlier product) | Port is officialy registered by IANA for this application | |
3299 | TCP | SAP-Router (routing application proxy for SAP R/3) | Port is not officialy registered by IANA for this application | |
3300 | TCP | UDP | Debate Gopher backend database system | Port is not officialy registered by IANA for this application |
3305 | TCP | UDP | odette-ftp, Odette File Transfer Protocol (OFTP) | Port is officialy registered by IANA for this application |
3306 | TCP | UDP | MySQL database system | Port is officialy registered by IANA for this application |
3313 | TCP | Verisys – File Integrity Monitoring Software | Port is not officialy registered by IANA for this application | |
3333 | TCP | Network Caller ID server | Port is not officialy registered by IANA for this application | |
3333 | TCP | CruiseControl.rb 46 | Port is not officialy registered by IANA for this application | |
3386 | TCP | UDP | GTP’ 3GPP GSM/UMTS CDR logging protocol | Port is officialy registered by IANA for this application |
3389 | TCP | UDP | Microsoft Terminal Server (RDP) officially registered as Windows Based Terminal (WBT) – Link | Port is officialy registered by IANA for this application |
3396 | TCP | UDP | Novell NDPS Printer Agent | Port is officialy registered by IANA for this application |
3412 | TCP | UDP | xmlBlaster | Port is officialy registered by IANA for this application |
3455 | TCP | UDP | RSVP Reservation Protocol | Port is officialy registered by IANA for this application |
3423 | TCP | Xware xTrm Communication Protocol | Port is officialy registered by IANA for this application | |
3424 | TCP | Xware xTrm Communication Protocol over SSL | Port is officialy registered by IANA for this application | |
3478 | TCP | UDP | STUN, a protocol for NAT traversal 47 | Port is officialy registered by IANA for this application |
3478 | TCP | UDP | TURN, a protocol for NAT traversal 48 | Port is officialy registered by IANA for this application |
3483 | UDP | Slim Devices discovery protocol | Port is officialy registered by IANA for this application | |
3483 | TCP | Slim Devices SlimProto protocol | Port is officialy registered by IANA for this application | |
3516 | TCP | UDP | Smartcard Port | Port is officialy registered by IANA for this application |
3527 | UDP | Microsoft Message Queuing | Port is officialy registered by IANA for this application | |
3535 | TCP | SMTP alternate | Port is not officialy registered by IANA for this application | |
3537 | TCP | UDP | ni-visa-remote | Port is not officialy registered by IANA for this application |
3544 | UDP | Teredo tunneling | Port is officialy registered by IANA for this application | |
3605 | UDP | ComCam IO Port | Port is officialy registered by IANA for this application | |
3606 | TCP | UDP | Splitlock Server | Port is officialy registered by IANA for this application |
3632 | TCP | distributed compiler | Port is officialy registered by IANA for this application | |
3689 | TCP | Digital Audio Access Protocol (DAAP)—used by Apple’s iTunes and AirPort Express | Port is officialy registered by IANA for this application | |
3690 | TCP | UDP | Subversion (SVN) version control system | Port is officialy registered by IANA for this application |
3702 | TCP | UDP | Web Services Dynamic Discovery (WS-Discovery), used by various components of Windows Vista | Port is officialy registered by IANA for this application |
3723 | TCP | UDP | Used by many Battle.net Blizzard games (Diablo II, Warcraft II, Warcraft III, StarCraft) | Port is not officialy registered by IANA for this application |
3724 | TCP | World of Warcraft Online gaming MMORPG | Port is officialy registered by IANA for this application | |
3724 | TCP | Club Penguin Disney online game for kids | Port is not officialy registered by IANA for this application | |
3724 | UDP | World of Warcraft Online gaming MMORPG | Port is officialy registered by IANA for this application | |
3784 | TCP | UDP | Ventrilo VoIP program used by Ventrilo | Port is not officialy registered by IANA for this application |
3785 | UDP | Ventrilo VoIP program used by Ventrilo | Port is not officialy registered by IANA for this application | |
3799 | UDP | IETF RADIUS Change of Authorization | Port is not officialy registered by IANA for this application | |
3800 | TCP | Used by HGG programs | Port is not officialy registered by IANA for this application | |
3880 | TCP | UDP | IGRS | Port is officialy registered by IANA for this application |
3868 | TCP | SCTP | Diameter base protocol (RFC 3588) | Port is officialy registered by IANA for this application |
3872 | TCP | Oracle Management Remote Agent | Port is not officialy registered by IANA for this application | |
3899 | TCP | Remote Administrator | Port is not officialy registered by IANA for this application | |
3900 | TCP | udt_os, IBM UniData UDT OS 49 | Port is officialy registered by IANA for this application | |
3945 | TCP | UDP | EMCADS service, a Giritech product used by G/On | Port is officialy registered by IANA for this application |
3978 | TCP | UDP | OpenTTD game (masterserver and content service) | Port is not officialy registered by IANA for this application |
3979 | TCP | UDP | OpenTTD game | Port is not officialy registered by IANA for this application |
3999 | TCP | UDP | Norman distributed scanning service | Port is officialy registered by IANA for this application |
4000 | TCP | UDP | Diablo II game | Port is not officialy registered by IANA for this application |
4001 | TCP | Microsoft Ants game | Port is not officialy registered by IANA for this application | |
4007 | TCP | PrintBuzzer printer monitoring socket server | Port is not officialy registered by IANA for this application | |
4018 | TCP | UDP | protocol information and warnings | Port is officialy registered by IANA for this application |
4069 | UDP | Minger Email Address Verification Protocol 50 | Port is officialy registered by IANA for this application | |
4089 | TCP | UDP | OpenCORE Remote Control Service | Port is officialy registered by IANA for this application |
4093 | TCP | UDP | PxPlus Client server interface ProvideX | Port is officialy registered by IANA for this application |
4096 | TCP | UDP | Ascom Timeplex BRE (Bridge Relay Element) | Port is officialy registered by IANA for this application |
4100 | WatchGuard Authentication Applet—default | Port is not officialy registered by IANA for this application | ||
4111 | TCP | Xgrid | Port is officialy registered by IANA for this application | |
4116 | TCP | UDP | Smartcard-TLS | Port is officialy registered by IANA for this application |
4125 | TCP | Microsoft Remote Web Workplace administration | Port is not officialy registered by IANA for this application | |
4172 | TCP | UDP | Teradici PCoIP | Port is officialy registered by IANA for this application |
4201 | TCP | TinyMUD and various derivatives | Port is not officialy registered by IANA for this application | |
4226 | TCP | UDP | Aleph One (game) | Port is not officialy registered by IANA for this application |
4224 | TCP | Cisco Audio Session Tunneling | Port is not officialy registered by IANA for this application | |
4321 | TCP | Referral Whois (RWhois) Protocol 51 | Port is officialy registered by IANA for this application | |
4323 | UDP | Lincoln Electric’s ArcLink/XT | Port is not officialy registered by IANA for this application | |
4433-4436 | TCP | Axence nVision | Port is not officialy registered by IANA for this application | |
4500 | UDP | IPSec NAT Traversal (RFC 3947) | Port is officialy registered by IANA for this application | |
4502-4534 | TCP | Microsoft Silverlight connectable ports under non-elevated trust | Port is officialy registered by IANA for this application | |
4534 | UDP | Armagetron Advanced default server port | Port is not officialy registered by IANA for this application | |
4567 | TCP | Sinatra default server port in development mode (HTTP) | Port is not officialy registered by IANA for this application | |
4569 | UDP | Inter-Asterisk eXchange (IAX2) | Port is officialy registered by IANA for this application | |
4610–4640 | TCP | QualiSystems TestShell Suite Services | Port is not officialy registered by IANA for this application | |
4662 | UDP | OrbitNet Message Service | Port is officialy registered by IANA for this application | |
4662 | TCP | OrbitNet Message Service | Port is officialy registered by IANA for this application | |
4662 | TCP | Default for older versions of eMule 52 | Port is not officialy registered by IANA for this application | |
4664 | TCP | Google Desktop Search | Port is not officialy registered by IANA for this application | |
4672 | UDP | Default for older versions of eMule 52 | Port is not officialy registered by IANA for this application | |
4711 | TCP | eMule optional web interface 52 | Port is not officialy registered by IANA for this application | |
4711 | TCP | McAfee Web Gateway 7 – Default GUI Port HTTP | Port is not officialy registered by IANA for this application | |
4712 | TCP | McAfee Web Gateway 7 – Default GUI Port HTTPS | Port is not officialy registered by IANA for this application | |
4728 | TCP | Computer Associates Desktop and Server Management (DMP)/Port Multiplexer 53 | Port is officialy registered by IANA for this application | |
4747 | TCP | Apprentice | Port is not officialy registered by IANA for this application | |
4750 | TCP | BladeLogic Agent | Port is not officialy registered by IANA for this application | |
4840 | TCP | UDP | OPC UA TCP Protocol for OPC Unified Architecture from OPC Foundation | Port is officialy registered by IANA for this application |
4843 | TCP | UDP | OPC UA TCP Protocol over TLS/SSL for OPC Unified Architecture from OPC Foundation | Port is officialy registered by IANA for this application |
4847 | TCP | UDP | Web Fresh Communication, Quadrion Software & Odorless Entertainment | Port is officialy registered by IANA for this application |
4886 | TCP | War of No Return Server Port | Port is not officialy registered by IANA for this application | |
4894 | TCP | UDP | LysKOM Protocol A | Port is officialy registered by IANA for this application |
4899 | TCP | UDP | Radmin remote administration tool | Port is officialy registered by IANA for this application |
4949 | TCP | Munin Resource Monitoring Tool | Port is officialy registered by IANA for this application | |
4950 | TCP | UDP | Cylon Controls UC32 Communications Port | Port is officialy registered by IANA for this application |
4982 | TCP | UDP | Solar Data Log (JK client app for PV solar inverters ) | Port is not officialy registered by IANA for this application |
4993 | TCP | UDP | Home FTP Server web Interface Default Port | Port is not officialy registered by IANA for this application |
5000 | TCP | commplex-main | Port is officialy registered by IANA for this application | |
5000 | TCP | UPnP—Windows network device interoperability | Port is not officialy registered by IANA for this application | |
5000 | TCP | VTun—VPN Software | Port is not officialy registered by IANA for this application | |
5000 | UDP | FlightGear multiplayer 54 | Port is not officialy registered by IANA for this application | |
5000 | UDP | VTun—VPN Software | Port is not officialy registered by IANA for this application | |
5001 | TCP | commplex-link | Port is officialy registered by IANA for this application | |
5001 | TCP | Slingbox and Slingplayer | Port is not officialy registered by IANA for this application | |
5001 | TCP | Iperf (Tool for measuring TCP and UDP bandwidth performance) | Port is not officialy registered by IANA for this application | |
5001 | UDP | Iperf (Tool for measuring TCP and UDP bandwidth performance) | Port is not officialy registered by IANA for this application | |
5002 | TCP | SOLICARD ARX 55 | Port is not officialy registered by IANA for this application | |
5003 | TCP | UDP | FileMaker | Port is officialy registered by IANA for this application |
5004 | TCP | UDP | RTP (Real-time Transport Protocol) media data (RFC 3551, RFC 4571) | Port is officialy registered by IANA for this application |
5004 | DCCP | RTP (Real-time Transport Protocol) media data (RFC 3551, RFC 4571) | Port is officialy registered by IANA for this application | |
5005 | TCP | UDP | RTP (Real-time Transport Protocol) control protocol (RFC 3551, RFC 4571) | Port is officialy registered by IANA for this application |
5005 | DCCP | RTP (Real-time Transport Protocol) control protocol (RFC 3551, RFC 4571) | Port is officialy registered by IANA for this application | |
5029 | TCP | Sonic Robo Blast 2 : Multiplayer | Port is not officialy registered by IANA for this application | |
5031 | TCP | UDP | AVM CAPI-over-TCP (ISDN over Ethernet tunneling) | Port is not officialy registered by IANA for this application |
5050 | TCP | Yahoo! Messenger | Port is not officialy registered by IANA for this application | |
5051 | TCP | ita-agent Symantec Intruder Alert 56 | Port is officialy registered by IANA for this application | |
5060 | TCP | UDP | Session Initiation Protocol (SIP) | Port is officialy registered by IANA for this application |
5061 | TCP | Session Initiation Protocol (SIP) over TLS | Port is officialy registered by IANA for this application | |
5070 | TCP | Binary Floor Control Protocol (BFCP), 57 published as RFC 4582, is a protocol that allows for an additional video channel (known as the content channel) alongside the main video channel in a video-conferencing call that uses SIP. Also used for Session Initiation Protocol (SIP) preferred port for PUBLISH on SIP Trunk to Cisco Unified Presence Server (CUPS) | Port is not officialy registered by IANA for this application | |
5082 | TCP | UDP | Qpur Communication Protocol | Port is officialy registered by IANA for this application |
5083 | TCP | UDP | Qpur File Protocol | Port is officialy registered by IANA for this application |
5084 | TCP | UDP | EPCglobal Low Level Reader Protocol (LLRP) | Port is officialy registered by IANA for this application |
5085 | TCP | UDP | EPCglobal Low Level Reader Protocol (LLRP) over TLS | Port is officialy registered by IANA for this application |
5093 | UDP | SafeNet, Inc Sentinel LM, Sentinel RMS, License Manager, Client-to-Server | Port is officialy registered by IANA for this application | |
5099 | TCP | UDP | SafeNet, Inc Sentinel LM, Sentinel RMS, License Manager, Server-to-Server | Port is officialy registered by IANA for this application |
5104 | TCP | IBM Tivoli Framework NetCOOL/Impact 58 HTTP Service | Port is not officialy registered by IANA for this application | |
5106 | TCP | A-Talk Common connection | Port is not officialy registered by IANA for this application | |
5107 | TCP | A-Talk Remote server connection | Port is not officialy registered by IANA for this application | |
5108 | TCP | VPOP3 Mail Server Webmail | Port is not officialy registered by IANA for this application | |
5109 | TCP | UDP | VPOP3 Mail Server Status | Port is not officialy registered by IANA for this application |
5110 | TCP | ProRat Server | Port is not officialy registered by IANA for this application | |
5121 | TCP | Neverwinter Nights | Port is not officialy registered by IANA for this application | |
5150 | TCP | UDP | ATMP Ascend Tunnel Management Protocol 59 | Port is officialy registered by IANA for this application |
5150 | TCP | UDP | Malware Cerberus RAT | Port is not officialy registered by IANA for this application |
5151 | TCP | ESRI SDE Instance | Port is officialy registered by IANA for this application | |
5151 | UDP | ESRI SDE Remote Start | Port is officialy registered by IANA for this application | |
5154 | TCP | UDP | BZFlag | Port is officialy registered by IANA for this application |
5176 | TCP | ConsoleWorks default UI interface | Port is not officialy registered by IANA for this application | |
5190 | TCP | ICQ and AOL Instant Messenger | Port is officialy registered by IANA for this application | |
5222 | TCP | Extensible Messaging and Presence Protocol (XMPP) client connection 60 61 | Port is officialy registered by IANA for this application | |
5223 | TCP | Extensible Messaging and Presence Protocol (XMPP) client connection over SSL | Port is not officialy registered by IANA for this application | |
5228 | TCP | HP Virtual Room Service | Port is officialy registered by IANA for this application | |
5228 | TCP | Android Market | Port is not officialy registered by IANA for this application | |
5246 | UDP | Control And Provisioning of Wireless Access Points (CAPWAP) CAPWAP control 62 | Port is officialy registered by IANA for this application | |
5247 | UDP | Control And Provisioning of Wireless Access Points (CAPWAP) CAPWAP data 62 | Port is officialy registered by IANA for this application | |
5269 | TCP | Extensible Messaging and Presence Protocol (XMPP) server connection 60 61 | Port is officialy registered by IANA for this application | |
5280 | TCP | Extensible Messaging and Presence Protocol (XMPP) XEP-0124: Bidirectional-streams Over Synchronous HTTP (BOSH) | Port is officialy registered by IANA for this application | |
5281 | TCP | Undo License Manager | Port is officialy registered by IANA for this application | |
5281 | TCP | Extensible Messaging and Presence Protocol (XMPP) XEP-0124: Bidirectional-streams Over Synchronous HTTP (BOSH) with SSL | Port is not officialy registered by IANA for this application | |
5298 | TCP | UDP | Extensible Messaging and Presence Protocol (XMPP) XEP-0174: Serverless Messaging | Port is officialy registered by IANA for this application |
5310 | TCP | UDP | Ginever.net data communication port | Port is not officialy registered by IANA for this application |
5311 | TCP | UDP | Ginever.net data communication port | Port is not officialy registered by IANA for this application |
5312 | TCP | UDP | Ginever.net data communication port | Port is not officialy registered by IANA for this application |
5313 | TCP | UDP | Ginever.net data communication port | Port is not officialy registered by IANA for this application |
5314 | TCP | UDP | Ginever.net data communication port | Port is not officialy registered by IANA for this application |
5315 | TCP | UDP | Ginever.net data communication port | Port is not officialy registered by IANA for this application |
5349 | TCP | STUN, a protocol for NAT traversal (UDP is reserved) 47 | Port is officialy registered by IANA for this application | |
5349 | TCP | TURN, a protocol for NAT traversal (UDP is reserved) 48 | Port is officialy registered by IANA for this application | |
5351 | TCP | UDP | NAT Port Mapping Protocol—client-requested configuration for inbound connections through network address translators | Port is officialy registered by IANA for this application |
5353 | UDP | Multicast DNS (mDNS) | Port is officialy registered by IANA for this application | |
5355 | TCP | UDP | LLMNR—Link-Local Multicast Name Resolution, allows hosts to perform name resolution for hosts on the same local link (only provided by Windows Vista and Server 2008) | Port is officialy registered by IANA for this application |
5357 | TCP | UDP | Web Services for Devices (WSDAPI) (only provided by Windows Vista, Windows 7 and Server 2008) | Port is not officialy registered by IANA for this application |
5358 | TCP | UDP | WSDAPI Applications to Use a Secure Channel (only provided by Windows Vista, Windows 7 and Server 2008) | Port is not officialy registered by IANA for this application |
5402 | TCP | UDP | mftp, Stratacache OmniCast content delivery system MFTP file sharing protocol | Port is officialy registered by IANA for this application |
5405 | TCP | UDP | NetSupport Manager | Port is officialy registered by IANA for this application |
5412 | TCP | UDP | IBM Rational Synergy (Telelogic_Synergy) (Continuus CM) Message Router | Port is officialy registered by IANA for this application |
5421 | TCP | UDP | NetSupport Manager | Port is officialy registered by IANA for this application |
5432 | TCP | UDP | PostgreSQL database system | Port is officialy registered by IANA for this application |
5433 | TCP | Bouwsoft file/webserver <http://www.bouwsoft.be> | Port is not officialy registered by IANA for this application | |
5445 | UDP | Cisco Unified Video Advantage | Port is not officialy registered by IANA for this application | |
5450 | TCP | OSIsoft PI Server Client Access | Port is not officialy registered by IANA for this application | |
5457 | TCP | OSIsoft PI Asset Framework Client Access | Port is not officialy registered by IANA for this application | |
5458 | TCP | OSIsoft PI Notifications Client Access | Port is not officialy registered by IANA for this application | |
5495 | TCP | Applix TM1 Admin server | Port is not officialy registered by IANA for this application | |
5498 | TCP | Hotline tracker server connection | Port is not officialy registered by IANA for this application | |
5499 | UDP | Hotline tracker server discovery | Port is not officialy registered by IANA for this application | |
5500 | TCP | VNC remote desktop protocol—for incoming listening viewer, Hotline control connection | Port is not officialy registered by IANA for this application | |
5501 | TCP | Hotline file transfer connection | Port is not officialy registered by IANA for this application | |
5517 | TCP | Setiqueue Proxy server client for SETI@Home project | Port is not officialy registered by IANA for this application | |
5550 | TCP | Hewlett-Packard Data Protector | Port is not officialy registered by IANA for this application | |
5555 | TCP | Freeciv versions up to 2.0, Hewlett-Packard Data Protector, McAfee EndPoint Encryption Database Server, SAP, Default for Microsoft Dynamics CRM 4.0 | Port is not officialy registered by IANA for this application | |
5556 | TCP | UDP | Freeciv | Port is officialy registered by IANA for this application |
5591 | TCP | Default for Tidal Enterprise Scheduler master-Socket used for communication between Agent-to-Master, though can be changed | Port is not officialy registered by IANA for this application | |
5631 | TCP | pcANYWHEREdata, Symantec pcAnywhere (version 7.52 and later 63 ) 64 data | Port is officialy registered by IANA for this application | |
5632 | UDP | pcANYWHEREstat, Symantec pcAnywhere (version 7.52 and later) status | Port is officialy registered by IANA for this application | |
5656 | TCP | IBM Sametime p2p file transfer | Port is not officialy registered by IANA for this application | |
5666 | TCP | NRPE (Nagios) | Port is not officialy registered by IANA for this application | |
5667 | TCP | NSCA (Nagios) | Port is not officialy registered by IANA for this application | |
5678 | UDP | Mikrotik RouterOS Neighbor Discovery Protocol (MNDP) | Port is not officialy registered by IANA for this application | |
5721 | TCP | UDP | Kaseya | Port is not officialy registered by IANA for this application |
5723 | TCP | Operations Manager | Port is not officialy registered by IANA for this application | |
5741 | TCP | UDP | IDA Discover Port 1 | Port is officialy registered by IANA for this application |
5742 | TCP | UDP | IDA Discover Port 2 | Port is officialy registered by IANA for this application |
5800 | TCP | VNC remote desktop protocol—for use over HTTP | Port is not officialy registered by IANA for this application | |
5814 | TCP | UDP | Hewlett-Packard Support Automation (HP OpenView Self-Healing Services) | Port is officialy registered by IANA for this application |
5850 | TCP | COMIT SE (PCR) | Port is not officialy registered by IANA for this application | |
5852 | TCP | Adeona client: communications to OpenDHT | Port is not officialy registered by IANA for this application | |
5900 | TCP | UDP | Virtual Network Computing (VNC) remote desktop protocol (used by Apple Remote Desktop and others) | Port is officialy registered by IANA for this application |
5912 | TCP | Default for Tidal Enterprise Scheduler agent-Socket used for communication between Master-to-Agent, though can be changed | Port is not officialy registered by IANA for this application | |
5938 | TCP | UDP | TeamViewer 65 remote desktop protocol | Port is not officialy registered by IANA for this application |
5984 | TCP | UDP | CouchDB database server | Port is officialy registered by IANA for this application |
5999 | TCP | CVSup 66 file update tool | Port is officialy registered by IANA for this application | |
6000 | TCP | X11—used between an X client and server over the network | Port is officialy registered by IANA for this application | |
6001 | UDP | X11—used between an X client and server over the network | Port is officialy registered by IANA for this application | |
6005 | TCP | Default for BMC Software Control-M/Server—Socket used for communication between Control-M processes—though often changed during installation | Port is officialy registered by IANA for this application | |
6005 | TCP | Default for Camfrog Chat & Cam Client http://www.camfrog.com | Port is not officialy registered by IANA for this application | |
6050 | TCP | Brightstor Arcserve Backup | Port is not officialy registered by IANA for this application | |
6050 | TCP | Nortel Software | Port is not officialy registered by IANA for this application | |
6051 | TCP | Brightstor Arcserve Backup | Port is not officialy registered by IANA for this application | |
6072 | TCP | iOperator Protocol Signal Port | Port is not officialy registered by IANA for this application | |
6086 | TCP | PDTP—FTP like file server in a P2P network | Port is officialy registered by IANA for this application | |
6100 | TCP | Vizrt System | Port is not officialy registered by IANA for this application | |
6100 | TCP | Ventrilo This is the authentication port that must be allowed outbound for version 3 of Ventrilo | Port is officialy registered by IANA for this application | |
6101 | TCP | Backup Exec Agent Browser | Port is not officialy registered by IANA for this application | |
6110 | TCP | UDP | softcm, HP Softbench CM | Port is officialy registered by IANA for this application |
6111 | TCP | UDP | spc, HP Softbench Sub-Process Control | Port is officialy registered by IANA for this application |
6112 | UDP | dtspcd—a network daemon that accepts requests from clients to execute commands and launch applications remotely | Port is officialy registered by IANA for this application | |
6112 | TCP | dtspcd—a network daemon that accepts requests from clients to execute commands and launch applications remotely | Port is officialy registered by IANA for this application | |
6112 | TCP | Blizzard’s Battle.net gaming service, ArenaNet gaming service, Relic gaming sercive | Port is not officialy registered by IANA for this application | |
6112 | TCP | Club Penguin Disney online game for kids | Port is not officialy registered by IANA for this application | |
6113 | TCP | Club Penguin Disney online game for kids | Port is not officialy registered by IANA for this application | |
6129 | TCP | DameWare Remote Control | Port is officialy registered by IANA for this application | |
6257 | UDP | WinMX (see also 6699) | Port is not officialy registered by IANA for this application | |
6260 | TCP | UDP | planet M.U.L.E. | Port is not officialy registered by IANA for this application |
6262 | TCP | Sybase Advantage Database Server | Port is not officialy registered by IANA for this application | |
6343 | UDP | SFlow, sFlow traffic monitoring | Port is officialy registered by IANA for this application | |
6346 | TCP | UDP | gnutella-svc, gnutella (FrostWire, Limewire, Shareaza, etc.) | Port is officialy registered by IANA for this application |
6347 | TCP | UDP | gnutella-rtr, Gnutella alternate | Port is officialy registered by IANA for this application |
6350 | TCP | UDP | App Discovery and Access Protocol | Port is officialy registered by IANA for this application |
6389 | TCP | EMC CLARiiON | Port is not officialy registered by IANA for this application | |
6432 | TCP | PgBouncer – A connection pooler for PostgreSQL | Port is officialy registered by IANA for this application | |
6444 | TCP | UDP | Sun Grid Engine—Qmaster Service | Port is officialy registered by IANA for this application |
6445 | TCP | UDP | Sun Grid Engine—Execution Service | Port is officialy registered by IANA for this application |
6502 | TCP | UDP | Netop Business Solutions – NetOp Remote Control | Port is not officialy registered by IANA for this application |
6503 | UDP | Netop Business Solutions – NetOp School | Port is not officialy registered by IANA for this application | |
6522 | TCP | Gobby (and other libobby-based software) | Port is not officialy registered by IANA for this application | |
6523 | TCP | Gobby 0.5 (and other libinfinity-based software) | Port is not officialy registered by IANA for this application | |
6543 | UDP | Paradigm Research & Development Jetnet 67 default | Port is not officialy registered by IANA for this application | |
6566 | TCP | SANE (Scanner Access Now Easy)—SANE network scanner daemon | Port is not officialy registered by IANA for this application | |
6571 | Windows Live FolderShare client | Port is not officialy registered by IANA for this application | ||
6600 | TCP | Music Playing Daemon (MPD) | Port is not officialy registered by IANA for this application | |
6619 | TCP | UDP | odette-ftps, Odette File Transfer Protocol (OFTP) over TLS/SSL | Port is officialy registered by IANA for this application |
6646 | UDP | McAfee Network Agent | Port is not officialy registered by IANA for this application | |
6660–6664 | TCP | Internet Relay Chat (IRC) | Port is not officialy registered by IANA for this application | |
6665–6669 | TCP | Internet Relay Chat (IRC) | Port is officialy registered by IANA for this application | |
6679 | TCP | UDP | Osorno Automation Protocol (OSAUT) | Port is officialy registered by IANA for this application |
6679 | TCP | IRC SSL (Secure Internet Relay Chat)—often used | Port is not officialy registered by IANA for this application | |
6697 | TCP | IRC SSL (Secure Internet Relay Chat)—often used | Port is not officialy registered by IANA for this application | |
6699 | TCP | WinMX (see also 6257) | Port is not officialy registered by IANA for this application | |
6702 | TCP | Default for Tidal Enterprise Scheduler client-Socket used for communication between Client-to-Master, though can be changed | Port is not officialy registered by IANA for this application | |
6771 | UDP | Polycom server broadcast | Port is not officialy registered by IANA for this application | |
6789 | TCP | Datalogger Support Software Campbell Scientific Loggernet Software | Port is not officialy registered by IANA for this application | |
6881–6887 | TCP | UDP | BitTorrent part of full range of ports used most often | Port is not officialy registered by IANA for this application |
6888 | TCP | UDP | MUSE | Port is officialy registered by IANA for this application |
6888 | TCP | UDP | BitTorrent part of full range of ports used most often | Port is not officialy registered by IANA for this application |
6889–6890 | TCP | UDP | BitTorrent part of full range of ports used most often | Port is not officialy registered by IANA for this application |
6891–6900 | TCP | UDP | BitTorrent part of full range of ports used most often | Port is not officialy registered by IANA for this application |
6891–6900 | TCP | UDP | Windows Live Messenger (File transfer) | Port is not officialy registered by IANA for this application |
6901 | TCP | UDP | Windows Live Messenger (Voice) | Port is not officialy registered by IANA for this application |
6901 | TCP | UDP | BitTorrent part of full range of ports used most often | Port is not officialy registered by IANA for this application |
6902–6968 | TCP | UDP | BitTorrent part of full range of ports used most often | Port is not officialy registered by IANA for this application |
6969 | TCP | UDP | acmsoda | Port is officialy registered by IANA for this application |
6969 | TCP | BitTorrent tracker | Port is not officialy registered by IANA for this application | |
6970–6999 | TCP | UDP | BitTorrent part of full range of ports used most often | Port is not officialy registered by IANA for this application |
7000 | TCP | Default for Vuze’s built in HTTPS Bittorrent Tracker | Port is not officialy registered by IANA for this application | |
7001 | TCP | Default for BEA WebLogic Server’s HTTP server, though often changed during installation | Port is not officialy registered by IANA for this application | |
7002 | TCP | Default for BEA WebLogic Server’s HTTPS server, though often changed during installation | Port is not officialy registered by IANA for this application | |
7005 | TCP | Default for BMC Software Control-M/Server and Control-M/Agent for Agent-to-Server, though often changed during installation | Port is not officialy registered by IANA for this application | |
7006 | TCP | Default for BMC Software Control-M/Server and Control-M/Agent for Server-to-Agent, though often changed during installation | Port is not officialy registered by IANA for this application | |
7010 | TCP | Default for Cisco AON AMC (AON Management Console) 68 | Port is not officialy registered by IANA for this application | |
7022 | TCP | Database mirroring endpoints | Port is not officialy registered by IANA for this application | |
7023 | UDP | Bryan Wilcutt T2-NMCS Protocol for SatCom Modems | Port is officialy registered by IANA for this application | |
7025 | TCP | Zimbra LMTP mailbox —local mail delivery | Port is not officialy registered by IANA for this application | |
7047 | TCP | Zimbra conversion server | Port is not officialy registered by IANA for this application | |
7133 | TCP | Enemy Territory: Quake Wars | Port is not officialy registered by IANA for this application | |
7144 | TCP | Peercast | Port is not officialy registered by IANA for this application | |
7145 | TCP | Peercast | Port is not officialy registered by IANA for this application | |
7171 | TCP | Tibia | Port is not officialy registered by IANA for this application | |
7306 | TCP | Zimbra mysql mailbox | Port is not officialy registered by IANA for this application | |
7307 | TCP | Zimbra mysql logger | Port is not officialy registered by IANA for this application | |
7312 | UDP | Sibelius License Server | Port is not officialy registered by IANA for this application | |
7400 | TCP | UDP | RTPS (Real Time Publish Subscribe) DDS Discovery | Port is officialy registered by IANA for this application |
7401 | TCP | UDP | RTPS (Real Time Publish Subscribe) DDS User-Traffic | Port is officialy registered by IANA for this application |
7402 | TCP | UDP | RTPS (Real Time Publish Subscribe) DDS Meta-Traffic | Port is officialy registered by IANA for this application |
7473 | TCP | UDP | Rise: The Vieneo Province | Port is officialy registered by IANA for this application |
7547 | TCP | UDP | CPE WAN Management Protocol Technical Report 069 | Port is officialy registered by IANA for this application |
7615 | TCP | ISL Online 69 communication protocol | Port is not officialy registered by IANA for this application | |
7670 | TCP | BrettspielWelt BSW Boardgame Portal | Port is not officialy registered by IANA for this application | |
7676 | TCP | Aqumin AlphaVision Remote Command Interface | Port is not officialy registered by IANA for this application | |
7700 | UDP | P2P DC (RedHub) | Port is not officialy registered by IANA for this application | |
7707 | UDP | Killing Floor | Port is not officialy registered by IANA for this application | |
7708 | UDP | Killing Floor | Port is not officialy registered by IANA for this application | |
7717 | UDP | Killing Floor | Port is not officialy registered by IANA for this application | |
7777 | TCP | iChat server file transfer proxy | Port is not officialy registered by IANA for this application | |
7777 | TCP | Oracle Cluster File System 2 | Port is not officialy registered by IANA for this application | |
7777 | TCP | Windows backdoor program tini.exe default | Port is not officialy registered by IANA for this application | |
7777 | TCP | Xivio.com Chat Server Interface | Port is not officialy registered by IANA for this application | |
7777 | TCP | Terraria default server | Port is not officialy registered by IANA for this application | |
7778 | TCP | Bad Trip MUD | Port is not officialy registered by IANA for this application | |
7777-7788 | UDP | Unreal Tournament series default server | Port is not officialy registered by IANA for this application | |
7777-7788 | TCP | Unreal Tournament series default server | Port is not officialy registered by IANA for this application | |
7787-7788 | TCP | GFI EventsManager 7 & 8 | Port is officialy registered by IANA for this application | |
7831 | TCP | Default used by Smartlaunch Internet Cafe Administration 70 software | Port is not officialy registered by IANA for this application | |
7880 | TCP | UDP | PowerSchool Gradebook Server | Port is not officialy registered by IANA for this application |
7915 | TCP | Default for YSFlight server 3 | Port is not officialy registered by IANA for this application | |
7935 | TCP | Fixed port used for Adobe Flash Debug Player to communicate with a debugger (Flash IDE, Flex Builder or fdb). 71 | Port is not officialy registered by IANA for this application | |
7937-9936 | TCP | UDP | EMC2 (Legato) Networker or Sun Solcitice Backup | Port is officialy registered by IANA for this application |
8000 | UDP | iRDMI (Intel Remote Desktop Management Interface) 72 —sometimes erroneously used instead of port 8080 | Port is officialy registered by IANA for this application | |
8000 | TCP | iRDMI (Intel Remote Desktop Management Interface) 72 —sometimes erroneously used instead of port 8080 | Port is officialy registered by IANA for this application | |
8000 | TCP | Commonly used for internet radio streams such as those using SHOUTcast | Port is not officialy registered by IANA for this application | |
8001 | TCP | Commonly used for internet radio streams such as those using SHOUTcast | Port is not officialy registered by IANA for this application | |
8002 | TCP | Cisco Systems Unified Call Manager Intercluster | Port is not officialy registered by IANA for this application | |
8008 | TCP | HTTP Alternate | Port is officialy registered by IANA for this application | |
8008 | TCP | IBM HTTP Server administration default | Port is not officialy registered by IANA for this application | |
8009 | TCP | ajp13—Apache JServ Protocol AJP Connector | Port is not officialy registered by IANA for this application | |
8010 | TCP | XMPP File transfers | Port is not officialy registered by IANA for this application | |
8011-8013 | TCP | HTTP/TCP Symon Communications Event and Query Engine | Port is not officialy registered by IANA for this application | |
8014 | TCP | HTTP/TCP Symon Communications Event and Query Engine | Port is not officialy registered by IANA for this application | |
8014 | UDP | Perseus SDR Receiver default remote connection port | Port is not officialy registered by IANA for this application | |
8020 | TCP | 360Works SuperContainer | Port is not officialy registered by IANA for this application | |
8074 | TCP | Gadu-Gadu | Port is not officialy registered by IANA for this application | |
8075 | TCP | Killing Floor | Port is not officialy registered by IANA for this application | |
8078 | TCP | UDP | Default port for most Endless Online-based servers | Port is not officialy registered by IANA for this application |
8080 | TCP | HTTP alternate (http_alt)—commonly used for Web proxy and caching server, or for running a Web server as a non-root user | Port is officialy registered by IANA for this application | |
8080 | TCP | Apache Tomcat | Port is not officialy registered by IANA for this application | |
8080 | UDP | FilePhile Master/Relay | Port is not officialy registered by IANA for this application | |
8081 | TCP | HTTP alternate, VibeStreamer, e.g. McAfee ePolicy Orchestrator (ePO) | Port is not officialy registered by IANA for this application | |
8086 | TCP | HELM Web Host Automation Windows Control Panel | Port is not officialy registered by IANA for this application | |
8086 | TCP | Kaspersky AV Control Center | Port is not officialy registered by IANA for this application | |
8087 | TCP | Hosting Accelerator Control Panel | Port is not officialy registered by IANA for this application | |
8087 | TCP | Parallels Plesk Control Panel | Port is not officialy registered by IANA for this application | |
8087 | UDP | Kaspersky AV Control Center | Port is not officialy registered by IANA for this application | |
8088 | TCP | Asterisk (PBX) Web Configuration utility (GUI Addon) | Port is not officialy registered by IANA for this application | |
8089 | TCP | Splunk Daemon | Port is not officialy registered by IANA for this application | |
8090 | TCP | HTTP Alternate (http_alt_alt)—used as an alternative to port 8080 | Port is not officialy registered by IANA for this application | |
8100 | TCP | Console Gateway License Verification | Port is not officialy registered by IANA for this application | |
8116 | UDP | Check Point Cluster Control Protocol | Port is not officialy registered by IANA for this application | |
8118 | TCP | Privoxy—advertisement-filtering Web proxy | Port is officialy registered by IANA for this application | |
8123 | TCP | Polipo Web proxy | Port is officialy registered by IANA for this application | |
8192 | TCP | Sophos Remote Management System | Port is not officialy registered by IANA for this application | |
8193 | TCP | Sophos Remote Management System | Port is not officialy registered by IANA for this application | |
8194 | TCP | Sophos Remote Management System | Port is not officialy registered by IANA for this application | |
8200 | TCP | GoToMyPC | Port is not officialy registered by IANA for this application | |
8222 | TCP | VMware Server Management User Interface 73 (insecure Web interface). 74 See also port 8333 | Port is not officialy registered by IANA for this application | |
8243 | TCP | UDP | HTTPS listener for Apache Synapse 75 | Port is officialy registered by IANA for this application |
8280 | TCP | UDP | HTTP listener for Apache Synapse 75 | Port is officialy registered by IANA for this application |
8291 | TCP | Winbox—Default on a MikroTik RouterOS for a Windows application used to administer MikroTik RouterOS | Port is not officialy registered by IANA for this application | |
8303 | UDP | Teeworlds Server | Port is not officialy registered by IANA for this application | |
8331 | TCP | MultiBit, 4 | Port is not officialy registered by IANA for this application | |
8332 | TCP | Bitcoin JSON-RPC server 76 | Port is not officialy registered by IANA for this application | |
8333 | TCP | Bitcoin 77 | Port is not officialy registered by IANA for this application | |
8333 | TCP | VMware Server Management User Interface 73 (secure Web interface). 74 See also port 8222 | Port is not officialy registered by IANA for this application | |
8400 | TCP | UDP | cvp, Commvault Unified Data Management | Port is officialy registered by IANA for this application |
8442 | TCP | UDP | CyBro A-bus, Cybrotech Ltd. | Port is officialy registered by IANA for this application |
8443 | TCP | SW Soft Plesk Control Panel, Apache Tomcat SSL, Promise WebPAM SSL, McAfee ePolicy Orchestrator (ePO) | Port is not officialy registered by IANA for this application | |
8484 | TCP | UDP | MapleStory | Port is not officialy registered by IANA for this application |
8500 | TCP | UDP | ColdFusion Macromedia/Adobe ColdFusion default and Duke Nukem 3D—default | Port is not officialy registered by IANA for this application |
8501 | TCP | 5 DukesterX —default | Port is not officialy registered by IANA for this application | |
8601 | TCP | Wavestore CCTV protocol 6 | Port is not officialy registered by IANA for this application | |
8602 | TCP | UDP | Wavestore Notification protocol | Port is not officialy registered by IANA for this application |
8642 | TCP | Lotus Traveller | Port is not officialy registered by IANA for this application | |
8691 | TCP | Ultra Fractal default server port for distributing calculations over network computers | Port is not officialy registered by IANA for this application | |
8701 | UDP | SoftPerfect Bandwidth Manager | Port is not officialy registered by IANA for this application | |
8702 | UDP | SoftPerfect Bandwidth Manager | Port is not officialy registered by IANA for this application | |
8767 | UDP | TeamSpeak—default | Port is not officialy registered by IANA for this application | |
8768 | UDP | TeamSpeak—alternate | Port is not officialy registered by IANA for this application | |
8840 | TCP | Opera Unite server | Port is not officialy registered by IANA for this application | |
8880 | UDP | cddbp-alt, CD DataBase (CDDB) protocol (CDDBP) alternate | Port is officialy registered by IANA for this application | |
8880 | TCP | cddbp-alt, CD DataBase (CDDB) protocol (CDDBP) alternate | Port is officialy registered by IANA for this application | |
8880 | TCP | WebSphere Application Server SOAP connector default | Port is not officialy registered by IANA for this application | |
8880 | TCP | Win Media Streamer to Server SOAP connector default | Port is not officialy registered by IANA for this application | |
8881 | TCP | Atlasz Informatics Research Ltd 7 Secure Application Server | Port is not officialy registered by IANA for this application | |
8882 | TCP | Atlasz Informatics Research Ltd 8 Secure Application Server | Port is not officialy registered by IANA for this application | |
8883 | TCP | UDP | Secure MQ Telemetry Transport (MQTT over SSL) | Port is officialy registered by IANA for this application |
8887 | TCP | HyperVM HTTP | Port is officialy registered by IANA for this application | |
8888 | TCP | HyperVM HTTPS | Port is officialy registered by IANA for this application | |
8888 | TCP | Freenet HTTP | Port is not officialy registered by IANA for this application | |
8888 | TCP | UDP | NewsEDGE server | Port is officialy registered by IANA for this application |
8888 | TCP | Sun Answerbook dwhttpd server (deprecated by docs.sun.com) | Port is not officialy registered by IANA for this application | |
8888 | TCP | GNUmp3d HTTP music streaming and Web interface | Port is not officialy registered by IANA for this application | |
8888 | TCP | LoLo Catcher HTTP Web interface (www.optiform.com) | Port is not officialy registered by IANA for this application | |
8888 | TCP | D2GS Admin Console Telnet administration console for D2GS servers (Diablo 2) | Port is not officialy registered by IANA for this application | |
8888 | TCP | Earthland Relams 2 Server (AU1_2) | Port is not officialy registered by IANA for this application | |
8888 | TCP | MAMP Server | Port is not officialy registered by IANA for this application | |
8889 | TCP | MAMP Server | Port is not officialy registered by IANA for this application | |
8889 | TCP | Earthland Relams 2 Server (AU1_1) | Port is not officialy registered by IANA for this application | |
8983 | TCP | Default for Apache Solr 1.4 | Port is not officialy registered by IANA for this application | |
9000 | TCP | Buffalo LinkSystem Web access | Port is not officialy registered by IANA for this application | |
9000 | TCP | DBGp | Port is not officialy registered by IANA for this application | |
9000 | TCP | SqueezeCenter web server & streaming | Port is not officialy registered by IANA for this application | |
9000 | UDP | UDPCast | Port is not officialy registered by IANA for this application | |
9001 | TCP | UDP | ETL Service Manager 78 | Port is officialy registered by IANA for this application |
9001 | Microsoft Sharepoint Authoring Environment | Port is not officialy registered by IANA for this application | ||
9001 | cisco-xremote router configuration | Port is not officialy registered by IANA for this application | ||
9001 | Tor network default | Port is not officialy registered by IANA for this application | ||
9001 | TCP | DBGp Proxy | Port is not officialy registered by IANA for this application | |
9009 | TCP | UDP | Pichat Server—Peer to peer chat software | Port is officialy registered by IANA for this application |
9010 | TCP | TISERVICEMANAGEMENT Numara Track-It! | Port is not officialy registered by IANA for this application | |
9020 | TCP | WiT WiT Services | Port is officialy registered by IANA for this application | |
9025 | TCP | WiT WiT Services | Port is officialy registered by IANA for this application | |
9030 | TCP | Tor often used | Port is not officialy registered by IANA for this application | |
9043 | TCP | WebSphere Application Server Administration Console secure | Port is not officialy registered by IANA for this application | |
9050 | TCP | Tor | Port is not officialy registered by IANA for this application | |
9051 | TCP | Tor | Port is not officialy registered by IANA for this application | |
9060 | TCP | WebSphere Application Server Administration Console | Port is not officialy registered by IANA for this application | |
9080 | UDP | glrpc, Groove Collaboration software GLRPC | Port is officialy registered by IANA for this application | |
9080 | TCP | glrpc, Groove Collaboration software GLRPC | Port is officialy registered by IANA for this application | |
9080 | TCP | WebSphere Application Server HTTP Transport (port 1) default | Port is not officialy registered by IANA for this application | |
9090 | TCP | Webwasher, Secure Web, McAfee Web Gateway – Default Proxy Port | Port is not officialy registered by IANA for this application | |
9090 | TCP | Openfire Administration Console | Port is not officialy registered by IANA for this application | |
9090 | TCP | SqueezeCenter control (CLI) | Port is not officialy registered by IANA for this application | |
9091 | TCP | Openfire Administration Console (SSL Secured) | Port is not officialy registered by IANA for this application | |
9091 | TCP | Transmission (BitTorrent client) Web Interface | Port is not officialy registered by IANA for this application | |
9100 | TCP | PDL Data Stream | Port is officialy registered by IANA for this application | |
9101 | TCP | UDP | Bacula Director | Port is officialy registered by IANA for this application |
9102 | TCP | UDP | Bacula File Daemon | Port is officialy registered by IANA for this application |
9103 | TCP | UDP | Bacula Storage Daemon | Port is officialy registered by IANA for this application |
9105 | TCP | UDP | Xadmin Control Daemon | Port is officialy registered by IANA for this application |
9106 | TCP | UDP | Astergate Control Daemon | Port is officialy registered by IANA for this application |
9107 | TCP | Astergate-FAX Control Daemon | Port is officialy registered by IANA for this application | |
9110 | UDP | SSMP Message protocol | Port is not officialy registered by IANA for this application | |
9119 | TCP | UDP | MXit Instant Messenger | Port is officialy registered by IANA for this application |
9191 | TCP | Catamount Software – PocketMoney Sync | Port is not officialy registered by IANA for this application | |
9293 | TCP | Sony PlayStation RemotePlay | Port is not officialy registered by IANA for this application | |
9300 | TCP | IBM Cognos 8 SOAP Business Intelligence and Performance Management | Port is not officialy registered by IANA for this application | |
9303 | UDP | D-Link Shareport Share storage and MFP printers | Port is not officialy registered by IANA for this application | |
9306 | TCP | Sphinx Native API | Port is officialy registered by IANA for this application | |
9312 | TCP | Sphinx SphinxQL | Port is officialy registered by IANA for this application | |
9418 | TCP | UDP | git, Git pack transfer service | Port is officialy registered by IANA for this application |
9420 | TCP | MooseFS distributed file system—master server to chunk servers | Port is not officialy registered by IANA for this application | |
9421 | TCP | MooseFS distributed file system—master server to clients | Port is not officialy registered by IANA for this application | |
9422 | TCP | MooseFS distributed file system—chunk servers to clients | Port is not officialy registered by IANA for this application | |
9535 | TCP | UDP | mngsuite, LANDesk Management Suite Remote Control | Port is officialy registered by IANA for this application |
9536 | TCP | UDP | laes-bf, IP Fabrics Surveillance buffering function | Port is officialy registered by IANA for this application |
9561 | TCP | UDP | Network Time System Server | Port is not officialy registered by IANA for this application |
9600 | UDP | Omron FINS, OMRON FINS PLC communication | Port is officialy registered by IANA for this application | |
9675 | TCP | UDP | Spiceworks Desktop, IT Helpdesk Software | Port is not officialy registered by IANA for this application |
9676 | TCP | UDP | Spiceworks Desktop, IT Helpdesk Software | Port is not officialy registered by IANA for this application |
9695 | UDP | CCNx | Port is officialy registered by IANA for this application | |
9800 | TCP | UDP | WebDAV Source | Port is officialy registered by IANA for this application |
9800 | WebCT e-learning portal | Port is not officialy registered by IANA for this application | ||
9875 | TCP | Club Penguin Disney online game for kids | Port is not officialy registered by IANA for this application | |
9898 | UDP | MonkeyCom | Port is officialy registered by IANA for this application | |
9898 | TCP | MonkeyCom | Port is officialy registered by IANA for this application | |
9898 | TCP | Tripwire—File Integrity Monitoring Software | Port is not officialy registered by IANA for this application | |
9987 | UDP | TeamSpeak 3 server default (voice) port (for the conflicting service see the IANA list) | Port is not officialy registered by IANA for this application | |
9996 | TCP | UDP | The Palace “The Palace” Virtual Reality Chat software.—5 | Port is officialy registered by IANA for this application |
9998 | TCP | UDP | The Palace “The Palace” Virtual Reality Chat software.—5 | Port is officialy registered by IANA for this application |
9999 | Hydranode—edonkey2000 TELNET control | Port is not officialy registered by IANA for this application | ||
9999 | TCP | Lantronix UDS-10/UDS100 79 RS-485 to Ethernet Converter TELNET control | Port is not officialy registered by IANA for this application | |
9999 | Urchin Web Analytics | Port is not officialy registered by IANA for this application | ||
10000 | Webmin—Web-based Linux admin tool | Port is not officialy registered by IANA for this application | ||
10000 | BackupExec | Port is not officialy registered by IANA for this application | ||
10000 | Ericsson Account Manager (avim) | Port is not officialy registered by IANA for this application | ||
10001 | TCP | Lantronix UDS-10/UDS100 80 RS-485 to Ethernet Converter default | Port is not officialy registered by IANA for this application | |
10008 | TCP | UDP | Octopus Multiplexer, primary port for the CROMP protocol, which provides a platform-independent means for communication of objects across a network | Port is officialy registered by IANA for this application |
10009 | TCP | UDP | Cross Fire, a multiplayer online First Person Shooter | Port is not officialy registered by IANA for this application |
10010 | TCP | Open Object Rexx (ooRexx) rxapi daemon | Port is officialy registered by IANA for this application | |
10017 | AIX,NeXT, HPUX—rexd daemon control | Port is not officialy registered by IANA for this application | ||
10024 | TCP | Zimbra smtp mta —to amavis from postfix | Port is not officialy registered by IANA for this application | |
10025 | TCP | Zimbra smtp mta —back to postfix from amavis | Port is not officialy registered by IANA for this application | |
10050 | TCP | UDP | Zabbix-Agent | Port is officialy registered by IANA for this application |
10051 | TCP | UDP | Zabbix-Trapper | Port is officialy registered by IANA for this application |
10110 | TCP | UDP | NMEA 0183 Navigational Data. Transport of NMEA 0183 sentences over TCP or UDP | Port is officialy registered by IANA for this application |
10113 | TCP | UDP | NetIQ Endpoint | Port is officialy registered by IANA for this application |
10114 | TCP | UDP | NetIQ Qcheck | Port is officialy registered by IANA for this application |
10115 | TCP | UDP | NetIQ Endpoint | Port is officialy registered by IANA for this application |
10116 | TCP | UDP | NetIQ VoIP Assessor | Port is officialy registered by IANA for this application |
10200 | TCP | FRISK Software International’s fpscand virus scanning daemon for Unix platforms 81 | Port is not officialy registered by IANA for this application | |
10200 | TCP | FRISK Software International’s f-protd virus scanning daemon for Unix platforms 82 | Port is not officialy registered by IANA for this application | |
10201–10204 | TCP | FRISK Software International’s f-protd virus scanning daemon for Unix platforms 82 | Port is not officialy registered by IANA for this application | |
10301 | TCP | VoiceIP-ACS UMP default device provisioning endpoint | Port is not officialy registered by IANA for this application | |
10302 | TCP | VoiceIP-ACS UMP default device provisioning endpoint (SSL) | Port is not officialy registered by IANA for this application | |
10308 | Lock-on: Modern Air Combat | Port is not officialy registered by IANA for this application | ||
10480 | SWAT 4 Dedicated Server | Port is not officialy registered by IANA for this application | ||
10823 | UDP | Farming Simulator 2011 Default Server | Port is not officialy registered by IANA for this application | |
10891 | TCP | Jungle Disk (this port is opened by the Jungle Disk Monitor service on the localhost) | Port is not officialy registered by IANA for this application | |
11001 | TCP | UDP | metasys ( Johnson Controls Metasys java AC control environment ) | Port is not officialy registered by IANA for this application |
11211 | memcached | Port is not officialy registered by IANA for this application | ||
11235 | Savage:Battle for Newerth Server Hosting | Port is not officialy registered by IANA for this application | ||
11294 | Blood Quest Online Server | Port is not officialy registered by IANA for this application | ||
11371 | OpenPGP HTTP key server | Port is officialy registered by IANA for this application | ||
11576 | IPStor Server management communication | Port is not officialy registered by IANA for this application | ||
12010 | TCP | ElevateDB default database port 83 | Port is not officialy registered by IANA for this application | |
12011 | TCP | Axence nVision | Port is not officialy registered by IANA for this application | |
12012 | TCP | Axence nVision | Port is not officialy registered by IANA for this application | |
12012 | TCP | Audition Online Dance Battle, Korea Server—Status/Version Check | Port is not officialy registered by IANA for this application | |
12012 | UDP | Audition Online Dance Battle, Korea Server—Status/Version Check | Port is not officialy registered by IANA for this application | |
12013 | TCP | UDP | Audition Online Dance Battle, Korea Server | Port is not officialy registered by IANA for this application |
12035 | UDP | Linden Lab viewer to sim on SecondLife | Port is not officialy registered by IANA for this application | |
12222 | UDP | Light Weight Access Point Protocol (LWAPP) LWAPP data (RFC 5412) | Port is officialy registered by IANA for this application | |
12223 | UDP | Light Weight Access Point Protocol (LWAPP) LWAPP control (RFC 5412) | Port is officialy registered by IANA for this application | |
12345 | NetBus—remote administration tool (often Trojan horse). Also used by NetBuster. Little Fighter 2 (TCP). | Port is not officialy registered by IANA for this application | ||
12489 | TCP | NSClient/NSClient++/NC_Net (Nagios) | Port is not officialy registered by IANA for this application | |
12975 | TCP | LogMeIn Hamachi (VPN tunnel software; also port 32976)—used to connect to Mediation Server (bibi.hamachi.cc); will attempt to use SSL (TCP port 443) if both 12975 & 32976 fail to connect | Port is not officialy registered by IANA for this application | |
12998–12999 | UDP | Takenaka RDI Mirror World on SecondLife | Port is not officialy registered by IANA for this application | |
13000–13050 | UDP | Linden Lab viewer to sim on SecondLife | Port is not officialy registered by IANA for this application | |
13008 | TCP | UDP | Cross Fire, a multiplayer online First Person Shooter | Port is not officialy registered by IANA for this application |
13075 | TCP | Default 84 for BMC Software Control-M/Enterprise Manager Corba communication, though often changed during installation | Port is officialy registered by IANA for this application | |
13195-13196 | TCP | UDP | Ontolux Ontolux 2D | Port is not officialy registered by IANA for this application |
13337-13340 | TCP | UDP | ÆtherNet peer-to-peer networking | Port is not officialy registered by IANA for this application |
13720 | TCP | UDP | Symantec NetBackup—bprd (formerly VERITAS) | Port is officialy registered by IANA for this application |
13721 | TCP | UDP | Symantec NetBackup—bpdbm (formerly VERITAS) | Port is officialy registered by IANA for this application |
13724 | TCP | UDP | Symantec Network Utility—vnetd (formerly VERITAS) | Port is officialy registered by IANA for this application |
13782 | TCP | UDP | Symantec NetBackup—bpcd (formerly VERITAS) | Port is officialy registered by IANA for this application |
13783 | TCP | UDP | Symantec VOPIED protocol (formerly VERITAS) | Port is officialy registered by IANA for this application |
13785 | TCP | UDP | Symantec NetBackup Database—nbdb (formerly VERITAS) | Port is officialy registered by IANA for this application |
13786 | TCP | UDP | Symantec nomdb (formerly VERITAS) | Port is officialy registered by IANA for this application |
14439 | TCP | APRS UI-View Amateur Radio 85 UI-WebServer | Port is not officialy registered by IANA for this application | |
14567 | UDP | Battlefield 1942 and mods | Port is not officialy registered by IANA for this application | |
15000 | TCP | psyBNC | Port is not officialy registered by IANA for this application | |
15000 | TCP | Wesnoth | Port is not officialy registered by IANA for this application | |
15000 | TCP | Kaspersky Network Agent | Port is not officialy registered by IANA for this application | |
15000 | TCP | hydap, Hypack Hydrographic Software Packages Data Acquisition | Port is officialy registered by IANA for this application | |
15000 | UDP | hydap, Hypack Hydrographic Software Packages Data Acquisition | Port is officialy registered by IANA for this application | |
15567 | UDP | Battlefield Vietnam and mods | Port is not officialy registered by IANA for this application | |
15345 | TCP | UDP | XPilot Contact | Port is officialy registered by IANA for this application |
16000 | TCP | shroudBNC | Port is not officialy registered by IANA for this application | |
16080 | TCP | Mac OS X Server Web (HTTP) service with performance cache 86 | Port is not officialy registered by IANA for this application | |
16200 | TCP | Oracle Universal Content Management Content Server | Port is not officialy registered by IANA for this application | |
16250 | TCP | Oracle Universal Content Management Inbound Refinery | Port is not officialy registered by IANA for this application | |
16384 | UDP | Iron Mountain Digital online backup | Port is not officialy registered by IANA for this application | |
16567 | UDP | Battlefield 2 and mods | Port is not officialy registered by IANA for this application | |
17500 | TCP | Dropbox LanSync Protocol (db-lsp); used to synchronize file catalogs between Dropbox clients on your local network. | Port is officialy registered by IANA for this application | |
17500 | UDP | Dropbox LanSync Discovery (db-lsp-disc); used to synchronize file catalogs between Dropbox clients on your local network; is transmitted to broadcast addresses. | Port is officialy registered by IANA for this application | |
18010 | TCP | Super Dancer Online Extreme(SDO-X)—CiB Net Station Malaysia Server | Port is not officialy registered by IANA for this application | |
18104 | TCP | RAD PDF Service | Port is officialy registered by IANA for this application | |
18180 | TCP | DART Reporting server | Port is not officialy registered by IANA for this application | |
18200 | TCP | UDP | Audition Online Dance Battle, AsiaSoft Thailand Server—Status/Version Check | Port is not officialy registered by IANA for this application |
18201 | TCP | UDP | Audition Online Dance Battle, AsiaSoft Thailand Server | Port is not officialy registered by IANA for this application |
18206 | TCP | UDP | Audition Online Dance Battle, AsiaSoft Thailand Server—FAM Database | Port is not officialy registered by IANA for this application |
18300 | TCP | UDP | Audition Online Dance Battle, AsiaSoft SEA Server—Status/Version Check | Port is not officialy registered by IANA for this application |
18301 | TCP | UDP | Audition Online Dance Battle, AsiaSoft SEA Server | Port is not officialy registered by IANA for this application |
18306 | TCP | UDP | Audition Online Dance Battle, AsiaSoft SEA Server—FAM Database | Port is not officialy registered by IANA for this application |
18333 | TCP | Bitcoin testnet 87 | Port is not officialy registered by IANA for this application | |
18400 | TCP | UDP | Audition Online Dance Battle, KAIZEN Brazil Server—Status/Version Check | Port is not officialy registered by IANA for this application |
18401 | TCP | UDP | Audition Online Dance Battle, KAIZEN Brazil Server | Port is not officialy registered by IANA for this application |
18505 | TCP | UDP | Audition Online Dance Battle, Nexon Server—Status/Version Check | Port is not officialy registered by IANA for this application |
18506 | TCP | UDP | Audition Online Dance Battle, Nexon Server | Port is not officialy registered by IANA for this application |
18605 | TCP | UDP | X-BEAT—Status/Version Check | Port is not officialy registered by IANA for this application |
18606 | TCP | UDP | X-BEAT | Port is not officialy registered by IANA for this application |
19000 | TCP | UDP | Audition Online Dance Battle, G10/alaplaya Server—Status/Version Check | Port is not officialy registered by IANA for this application |
19001 | TCP | UDP | Audition Online Dance Battle, G10/alaplaya Server | Port is not officialy registered by IANA for this application |
19226 | TCP | Panda Software AdminSecure Communication Agent | Port is not officialy registered by IANA for this application | |
19283 | TCP | UDP | K2 – KeyAuditor & KeyServer, Sassafras Software Inc. Software Asset Management tools | Port is officialy registered by IANA for this application |
19294 | TCP | Google Talk Voice and Video connections 88 | Port is not officialy registered by IANA for this application | |
19295 | UDP | Google Talk Voice and Video connections 88 | Port is not officialy registered by IANA for this application | |
19302 | UDP | Google Talk Voice and Video connections 88 | Port is not officialy registered by IANA for this application | |
19315 | TCP | UDP | KeyShadow for K2 – KeyAuditor & KeyServer, Sassafras Software Inc. Software Asset Management tools | Port is officialy registered by IANA for this application |
19540 | TCP | UDP | Belkin Network USB Hub | Port is not officialy registered by IANA for this application |
19638 | TCP | Ensim Control Panel | Port is not officialy registered by IANA for this application | |
19771 | TCP | UDP | Softros LAN Messenger | Port is not officialy registered by IANA for this application |
19812 | TCP | 4D database SQL Communication | Port is not officialy registered by IANA for this application | |
19813 | TCP | 4D database Client Server Communication | Port is not officialy registered by IANA for this application | |
19814 | TCP | 4D database DB4D Communication | Port is not officialy registered by IANA for this application | |
19880 | TCP | Softros LAN Messenger | Port is not officialy registered by IANA for this application | |
19999 | DNP – Secure (Distributed Network Protocol – Secure), a secure version of the protocol used in SCADA systems between communicating RTU’s and IED’s | Port is officialy registered by IANA for this application | ||
20000 | DNP (Distributed Network Protocol), a protocol used in SCADA systems between communicating RTU’s and IED’s | Port is officialy registered by IANA for this application | ||
20000 | Usermin, Web-based user tool | Port is not officialy registered by IANA for this application | ||
20014 | TCP | DART Reporting server | Port is not officialy registered by IANA for this application | |
20560 | TCP | UDP | Killing Floor | Port is not officialy registered by IANA for this application |
20720 | TCP | Symantec i3 Web GUI server | Port is not officialy registered by IANA for this application | |
21001 | TCP | AMLFilter, AMLFilter Inc. amlf-admin default port | Port is not officialy registered by IANA for this application | |
21011 | TCP | AMLFilter, AMLFilter Inc. amlf-engine-01 default http port | Port is not officialy registered by IANA for this application | |
21012 | TCP | AMLFilter, AMLFilter Inc. amlf-engine-01 default https port | Port is not officialy registered by IANA for this application | |
21021 | TCP | AMLFilter, AMLFilter Inc. amlf-engine-02 default http port | Port is not officialy registered by IANA for this application | |
21022 | TCP | AMLFilter, AMLFilter Inc. amlf-engine-02 default https port | Port is not officialy registered by IANA for this application | |
22136 | TCP | FLIR Systems Camera Resource Protocol | Port is not officialy registered by IANA for this application | |
22222 | TCP | Davis Instruments, WeatherLink IP | Port is not officialy registered by IANA for this application | |
22347 | TCP | UDP | WibuKey, WIBU-SYSTEMS AG Software protection system | Port is officialy registered by IANA for this application |
22349 | TCP | Wolfson Microelectronics, WISCEBridge Debug Protocol | Port is not officialy registered by IANA for this application | |
22350 | TCP | UDP | CodeMeter, WIBU-SYSTEMS AG Software protection system | Port is officialy registered by IANA for this application |
23073 | Soldat Dedicated Server | Port is not officialy registered by IANA for this application | ||
23399 | Skype Default Protocol | Port is not officialy registered by IANA for this application | ||
23513 | Duke Nukem 3D#Source code Duke Nukem Ports | Port is not officialy registered by IANA for this application | ||
24444 | NetBeans integrated development environment | Port is not officialy registered by IANA for this application | ||
24465 | TCP | UDP | Tonido Directory Server for Tonido which is a Personal Web App and P2P platform | Port is officialy registered by IANA for this application |
24554 | TCP | UDP | BINKP, Fidonet mail transfers over TCP/IP | Port is officialy registered by IANA for this application |
24800 | Synergy: keyboard/mouse sharing software | Port is not officialy registered by IANA for this application | ||
24842 | StepMania: Online: Dance Dance Revolution Simulator | Port is not officialy registered by IANA for this application | ||
25000 | TCP | Teamware Office standard client connection | Port is officialy registered by IANA for this application | |
25003 | TCP | Teamware Office client notifier | Port is officialy registered by IANA for this application | |
25005 | TCP | Teamware Office message transfer | Port is officialy registered by IANA for this application | |
25007 | TCP | Teamware Office MIME Connector | Port is officialy registered by IANA for this application | |
25010 | TCP | Teamware Office Agent server | Port is officialy registered by IANA for this application | |
25565 | Minecraft Dedicated Server | Port is not officialy registered by IANA for this application | ||
25565 | MySQL Standard MySQL port | Port is not officialy registered by IANA for this application | ||
25826 | UDP | collectd default port 89 | Port is not officialy registered by IANA for this application | |
25888 | UDP | Xfire (Firewall Report, UDP_IN) IP Address (206.220.40.146) resolves to gameservertracking.xfire.com. Use unknown. | Port is not officialy registered by IANA for this application | |
25999 | TCP | Xfire | Port is not officialy registered by IANA for this application | |
26000 | UDP | id Software’s Quake server | Port is officialy registered by IANA for this application | |
26000 | TCP | id Software’s Quake server | Port is officialy registered by IANA for this application | |
26000 | TCP | CCP’s EVE Online Online gaming MMORPG | Port is not officialy registered by IANA for this application | |
26900 | TCP | CCP’s EVE Online Online gaming MMORPG | Port is not officialy registered by IANA for this application | |
26901 | TCP | CCP’s EVE Online Online gaming MMORPG | Port is not officialy registered by IANA for this application | |
27000 | UDP | (through 27006) id Software’s QuakeWorld master server | Port is not officialy registered by IANA for this application | |
27000-27009 | TCP | FlexNet Publisher’s License server (from the range of default ports) | Port is not officialy registered by IANA for this application | |
27010 | Source engine dedicated server port | Port is not officialy registered by IANA for this application | ||
27014 | Source engine dedicated server port (rare) | Port is not officialy registered by IANA for this application | ||
27015 | GoldSrc and Source engine dedicated server port | Port is not officialy registered by IANA for this application | ||
27016 | Magicka server port | Port is not officialy registered by IANA for this application | ||
27017 | mongoDB server port | Port is not officialy registered by IANA for this application | ||
27374 | Sub7 default. | Port is not officialy registered by IANA for this application | ||
27500 | UDP | (through 27900) id Software’s QuakeWorld | Port is not officialy registered by IANA for this application | |
27888 | UDP | Kaillera server | Port is not officialy registered by IANA for this application | |
27900-27901 | Nintendo Wi-Fi Connection | Port is not officialy registered by IANA for this application | ||
27901 | UDP | (through 27910) id Software’s Quake II master server | Port is not officialy registered by IANA for this application | |
27950 | UDP | OpenArena outgoing | Port is not officialy registered by IANA for this application | |
27960 | UDP | (through 27969) Activision’s Enemy Territory and id Software’s Quake III Arena, Quake III and Quake Live and some ioquake3 derived games (OpenArena incoming) | Port is not officialy registered by IANA for this application | |
28000 | Bitfighter Common/default Bitfighter Server | Port is not officialy registered by IANA for this application | ||
28001 | Starsiege: Tribes Common/default Tribes v.1 Server | Port is not officialy registered by IANA for this application | ||
28395 | TCP | www.SmartSystemsLLC.com Used by Smart Sale 5.0 | Port is not officialy registered by IANA for this application | |
28785 | UDP | Cube 2 Sauerbraten 90 | Port is not officialy registered by IANA for this application | |
28786 | UDP | Cube 2 Sauerbraten Port 2 90 | Port is not officialy registered by IANA for this application | |
28852 | TCP | UDP | Killing Floor | Port is not officialy registered by IANA for this application |
28910 | Nintendo Wi-Fi Connection | Port is not officialy registered by IANA for this application | ||
28960 | UDP | Call of Duty; Call of Duty: United Offensive; Call of Duty 2; Call of Duty 4: Modern Warfare; Call of Duty: World at War (PC Version) | Port is not officialy registered by IANA for this application | |
29000 | Perfect World International Used by the Perfect World International Client | Port is not officialy registered by IANA for this application | ||
29900-29901 | Nintendo Wi-Fi Connection | Port is not officialy registered by IANA for this application | ||
29920 | Nintendo Wi-Fi Connection | Port is not officialy registered by IANA for this application | ||
30000 | Pokémon Netbattle | Port is not officialy registered by IANA for this application | ||
30301 | BitTorrent | Port is not officialy registered by IANA for this application | ||
30564 | TCP | Multiplicity: keyboard/mouse/clipboard sharing software | Port is not officialy registered by IANA for this application | |
30718 | UDP | Lantronix Discovery for Lantronix serial-to-ethernet devices | Port is not officialy registered by IANA for this application | |
30777 | TCP | ZangZing agent | Port is not officialy registered by IANA for this application | |
31337 | TCP | Back Orifice—remote administration tool (often Trojan horse) | Port is not officialy registered by IANA for this application | |
31415 | ThoughtSignal—Server Communication Service (often Informational) | Port is not officialy registered by IANA for this application | ||
31456 | TCP | TetriNET IRC gateway on some servers | Port is not officialy registered by IANA for this application | |
31457 | TCP | TetriNET | Port is officialy registered by IANA for this application | |
31458 | TCP | TetriNET Used for game spectators | Port is not officialy registered by IANA for this application | |
32123 | TCP | x3Lobby Used by x3Lobby, an internet application. | Port is not officialy registered by IANA for this application | |
32245 | TCP | MMTSG-mutualed over MMT (encrypted transmission) | Port is not officialy registered by IANA for this application | |
32769 | TCP | FileNet RPC | Port is not officialy registered by IANA for this application | |
32976 | TCP | LogMeIn Hamachi (VPN tunnel software; also port 12975)—used to connect to Mediation Server (bibi.hamachi.cc); will attempt to use SSL (TCP port 443) if both 12975 & 32976 fail to connect | Port is not officialy registered by IANA for this application | |
33434 | TCP | UDP | traceroute | Port is officialy registered by IANA for this application |
33982 | TCP | UDP | Dezta software | Port is not officialy registered by IANA for this application |
34443 | Linksys PSUS4 print server | Port is not officialy registered by IANA for this application | ||
34567 | TCP | dhanalakshmi.org EDI service 91 | Port is officialy registered by IANA for this application | |
36963 | UDP | Any of the USGN online games, most notably Counter Strike 2D multiplayer (2D clone of popular CounterStrike computer game) | Port is not officialy registered by IANA for this application | |
37659 | TCP | Axence nVision | Port is not officialy registered by IANA for this application | |
37777 | TCP | Digital Video Recorder hardware | Port is not officialy registered by IANA for this application | |
40000 | TCP | UDP | SafetyNET p Real-time Industrial Ethernet protocol | Port is officialy registered by IANA for this application |
41823 | TCP | UDP | Murealm Client | Port is not officialy registered by IANA for this application |
43047 | TCP | TheòsMessenger second port for service TheòsMessenger | Port is officialy registered by IANA for this application | |
43048 | TCP | TheòsMessenger third port for service TheòsMessenger | Port is officialy registered by IANA for this application | |
43594–43595 | TCP | Jagex, RuneScape, FunOrb, etc. | Port is not officialy registered by IANA for this application | |
47001 | TCP | WinRM – Windows Remote Management Service 92 | Port is officialy registered by IANA for this application | |
47808 | TCP | UDP | BACnet Building Automation and Control Networks (4780810 = BAC016) | Port is officialy registered by IANA for this application |
49151 | TCP | UDP | The Internet Assigned Numbers Authority (IANA) port number reserver | Port is officialy registered by IANA for this application |
NSX-T Edge Transport Node Packet Capture
Google Jupiter Data Center Network Fabric - New Way of Building Data Center Network Underlay
Switch vSphere Enterprise Plus license to vSphere Standard on a NSX-T enabled cluster
Missing good old 'wr' command on N9K? let's bring it back!
Cisco Catalyst Stack Upgrade
Cisco DNA Upgrade Issues - Application Update Stuck
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Perhaps you’re angsty that you’ve forgotten what a certain port number meant. Rest assured, you don’t have to remember all 65,535 port numbers. With so much information to remember, it’s understandable if you forget a common port. That’s why we put together this cheat sheet of common network ports for you.
A crucial domain of expertise in IT-related certifications such as Cisco Certified Network Associate (CCNA) and those of CompTIA is port numbers and associated services , which this common ports and protocols cheat sheet covers. If you want to remember a port number or protocol, this cheat sheet will help everyone, from students to professionals.
Get a copy of this common ports cheat sheet here to keep on your desk. When you're ready, scroll below to find the port you’re looking for.
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The following tables cover services (and malware) that use common TCP ports and some UDP or SCTP ports.
Port number | Service name | Transport protocol | Description |
---|---|---|---|
7 | Echo | TCP, UDP | Echo service |
19 | CHARGEN | TCP, UDP | Character Generator Protocol, has severe vulnerabilities and thus is rarely used nowadays |
20 | FTP-data | TCP, SCTP | File Transfer Protocol data transfer |
21 | FTP | TCP, UDP, SCTP | File Transfer Protocol command control |
22 | SSH/SCP/SFTP | TCP, UDP, SCTP | Secure Shell, secure logins, file transfers ( ), and port forwarding |
23 | Telnet | TCP | Telnet protocol, for unencrypted text communications |
25 | SMTP | TCP | Simple Mail Transfer Protocol, used for email routing between mail servers |
42 | WINS Replication | TCP, UDP | Microsoft Windows Internet Name Service, vulnerable to attacks on a local network |
43 | WHOIS | TCP, UDP | Whois service, provides domain-level information |
49 | TACACS | UDP; can also use TCP but not necessarily on port 49 | Terminal Access Controller Access-Control System, provides remote authentication and related services for network access |
53 | DNS | TCP, UDP | Domain Name System name resolver |
67 | DHCP/BOOTP | UDP | Dynamic Host Configuration Protocol and its predecessor Bootstrap Protocol Server; server port |
68 | DHCP/BOOTP | UDP | Dynamic Host Configuration Protocol and its predecessor Bootstrap Protocol Server; client port |
69 | TFTP | UDP | Trivial File Transfer Protocol |
70 | Gopher | TCP | Gopher is a communication protocol for distributing, searching, and retrieving documents in Internet Protocol (IP) networks |
79 | Finger | TCP | Name/Finger protocol and Finger user information protocol, for retrieving and manipulating user information |
80 | HTTP | TCP, UDP, SCTP | Hypertext Transfer Protocol (HTTP) uses TCP in versions 1.x and 2. HTTP/3 uses QUIC, a transport protocol on top of UDP |
88 | Kerberos | TCP, UDP | Network authentication system |
102 | Microsoft Exchange ISO-TSAP | TCP | Microsoft Exchange ISO Transport Service Access Point (TSAP) Class 0 protocol |
110 | POP3 | TCP | Post Office Protocol, version 3 (POP3) |
113 | Ident | TCP | Identification Protocol, for identifying the user of a particular TCP connection |
119 | NNTP (Usenet) | TCP | Network News Transfer Protocol |
123 | NTP | UDP | Network Time Protocol |
135 | Microsoft RPC EPMAP | TCP, UDP | Microsoft Remote Procedure Call (RPC) Endpoint Mapper (EPMAP) service, for remote system access and management |
137 | NetBIOS-ns | TCP, UDP | NetBIOS Name Service, used for name registration and resolution |
138 | NetBIOS-dgm | TCP, UDP | NetBIOS Datagram Service, used for providing access to shared resources |
139 | NetBIOS-ssn | TCP, UDP | NetBIOS Session Service |
143 | IMAP | TCP, UDP | Internet Message Access Protocol (IMAP), management of electronic mail messages on a server |
161 | SNMP-agents (unencrypted) | UDP | Simple network management protocol; agents communicate on this port |
162 | SNMP-trap (unencrypted) | UDP | Simple network management protocol; listens for asynchronous traps |
177 | XDMCP | UDP | X Display Manager Control Protocol |
179 | BGP | TCP | Border Gateway Protocol |
194 | IRC | UDP | Internet Relay Chat |
201 | AppleTalk | TCP, UDP | AppleTalk Routing Maintenance. Trojan horses and computer viruses have used UDP port 201. |
264 | BGMP | TCP, UDP | Border Gateway Multicast Protocol |
318 | TSP | TCP, UDP | Time Stamp Protocol |
381 | HP Openview | TCP, UDP | HP performance data collector |
383 | HP Openview | TCP, UDP | HP data alarm manager |
389 | LDAP | TCP, UDP | Lightweight directory access protocol |
411 | (Multiple uses) | TCP, UDP | Direct Connect Hub, Remote MT Protocol |
412 | (Multiple uses) | TCP, UDP | Direct Connect Client-to-Client, Trap Convention Port |
427 | SLP | TCP | Service Location Protocol |
443 | HTTPS (HTTP over SSL) | TCP, UDP, SCTP | Hypertext Transfer Protocol Secure (HTTPS) uses TCP in versions 1.x and 2. HTTP/3 uses QUIC, a transport protocol on top of UDP. |
445 | Microsoft DS SMB | TCP, UDP | Microsoft Directory Services: TCP for Active Directory, Windows shares; UDP for Server Message Block (SMB) file-sharing |
464 | Kerberos | TCP, UDP | For password settings on Kerberos |
465 | SMTP over TLS/SSL, SSM | TCP | Authenticated SMTP over TLS/SSL (SMTPS), URL Rendezvous Directory for Cisco’s Source Specific Multicast protocol (SSM) |
497 | Dantz Retrospect | TCP, UDP | A software suite for backing up operating systems |
500 | IPSec / ISAKMP / IKE | UDP | Internet Protocol Security / Internet Security Association and Key Management Protocol / Internet Key Exchange |
512 | rexec | TCP | Remote Process Execution |
513 | rlogin | TCP | The Unix program allows users to log in on another host using a network. |
514 | syslog | UDP | Syslog Protocol, for collecting and organizing all of the log files sent from the various devices on a network |
515 | LPD/LPR | TCP | Line Printer Daemon protocol, or Line Printer Remote protocol |
520 | RIP | UDP | Routing Information Protocol, used to find the optimal path between source and destination networks |
521 | RIPng (IPv6) | UDP | Routing Information Protocol next generation, the IPv6 compatible version of RIP |
540 | UUCP | TCP | Unix-to-Unix Copy Protocol |
548 | AFP | TCP | Apple Filing Protocol |
554 | RTSP | TCP, UDP | Real Time Streaming Protocol |
546 | DHCPv6 | TCP, UDP | Dynamic Host Configuration Protocol version 6. DHCPv6 Clients listen for DHCPv6 messages on UDP port 546. |
547 | DHCPv6 | TCP, UDP | DHCPv6 Servers and DHCPv6 Relay Agents listen for DHCPv6 messages on UDP port 547. |
560 | rmonitor | UDP | Remote Monitor |
563 | NNTP over TLS/SSL | TCP, UDP | Network News Transfer Protocol with encryption and verification |
587 | SMTP | TCP | For email message submission via SMTP |
591 | FileMaker | TCP | FileMaker Web Companion, the web publishing technology available in FileMaker versions 4-6 |
593 | Microsoft DCOM | TCP, UDP | Distributed Component Object Model (DCOM) |
596 | SMSD | TCP, UDP | SysMan Station daemon |
631 | IPP | TCP | Internet Printing Protocol |
636 | LDAP over TLS/SSL | TCP, UDP | Lightweight Directory Access Protocol over TLS/SSL |
639 | MSDP (PIM) | TCP | Multicast Source Discovery Protocol, which is part of the Protocol Independent Multicast (PIM) family |
646 | LDP (MPLS) | TCP, UDP | Label Distribution Protocol, applies to routers capable of Multiprotocol Label Switching (MPLS) |
691 | Microsoft Exchange | TCP | Microsoft Exchange Routing |
860 | iSCSI | TCP | Internet Small Computer Systems Interface |
873 | rsync | TCP | The file synchronization protocol efficiently transfers and synchronizes files between devices and networked computers. |
902 | VMware Server | TCP, UDP | VMware ESXi, a hypervisor |
989 | FTPS | TCP | File Transfer Protocol (data) over TLS/SSL |
990 | FTPS | TCP | File Transfer Protocol (control) over TLS/SSL |
993 | IMAP over SSL (IMAPS) | TCP | Internet Message Access Protocol over TLS/SSL |
995 | POP3 over SSL (POP3S) | TCP, UDP | Post Office Protocol 3 over TLS/SSL |
Port number | Service name | Transport protocol | Description |
---|---|---|---|
1025 | Microsoft RPC | TCP | Microsoft Remote Procedure Call |
1026-1029 | Windows Messenger | UDP | Windows Messenger popup spam |
1080 | SOCKS proxy | TCP (or UDP since SOCKS5) | SOCKS stands for Socket Secure. This protocol exchanges network packets between a client and server through a proxy server. |
1080 | MyDoom | TCP | Computer virus |
1194 | OpenVPN | TCP, UDP | OpenVPN |
1214 | KAZAA | TCP | A peer-to-peer file-sharing protocol |
1241 | Nessus | TCP, UDP | Nessus Security Scanner |
1311 | Dell OpenManage | TCP | Dell EMC OpenManage Server Administrator Web GUI |
1337 | WASTE | TCP | WASTE peer-to-peer encrypted file-sharing Program |
1589 | Cisco VQP | TCP, UDP | Cisco VLAN Query Protocol (VQP) |
1701 | L2TP VPN | TCP | Layer Two Tunneling Protocol Virtual Private Networking |
1720 | H.323 | TCP | H.323 Call Control Signaling, a VoIP call control protocol |
1723 | Microsoft PPTP | TCP, UDP | Point-to-Point Tunneling Protocol Virtual Private Networking |
1725 | Steam | UDP | Valve Steam Client uses port 1725 |
1741 | CiscoWorks SNMS 2000 | TCP | CiscoWorks Small Network Management Solution web server |
1755 | MMS | TCP, UDP | Microsoft Media Server |
1812 | RADIUS | UDP | RADIUS server authentication and authorization |
1813 | RADIUS | UDP | RADIUS server accounting |
1863 | (Multiple uses) | TCP, UDP | MSN Messenger, Xbox Live 360 |
1900 | UPnP | UDP | Universal Plug and Play |
1985 | Cisco HSRP | UDP | Hot Standby Router Protocol |
2000 | Cisco SCCP | TCP | Skinny Client Control Protocol |
2002 | Cisco ACS | TCP | Access Control Server |
2049 | NFS | UDP | Network File Sharing |
2082 | cPanel | TCP, UDP | cPanel default |
2083 | radsec, cPanel | TCP, UDP | Secure RADIUS Service ( ), cPanel default SSL |
2100 | amiganetfs | TCP | Amiga Network Filesystem |
2222 | DirectAdmin | TCP | Graphical web hosting control panel |
2302 | Gaming | UDP | The game HALO uses this port extensively |
2483 | Oracle | TCP, UDP | Oracle database listening for insecure client connections to the listener, replaces port 1521 |
2484 | Oracle | TCP, UDP | Oracle database listening for SSL client connections to the listener |
2745 | Bagle.C – Bagle.H | TCP | Computer worms |
2967 | Symantec AV | TCP, UDP | Symantec System Center agent (SSC-AGENT) |
3050 | Interbase DB | TCP, UDP | Borland Interbase database |
3074 | XBOX Live | TCP, UDP | Gaming: Xbox LIVE and Games for Windows – Live |
3127 | MyDoom | TCP | Computer worm |
3128 | HTTP Proxy | TCP | Common web proxy server ports: 80, 8080, 3128, 6588 |
3222 | GLBP | TCP, UDP | Gateway Load Balancing Protocol |
3260 | iSCSI Target | TCP, UDP | Microsoft iSCSI Target Server |
3306 | MySQL | TCP | MySQL database system |
3389 | RDP | TCP | Windows Remote Desktop Protocol (Microsoft Terminal Server) |
3689 | DAAP | TCP | Digital Audio Access Protocol, used by Apple’s iTunes and AirPort Express |
3690 | SVN | TCP, UDP | Apache Subversion, a version control system |
3724 | World of Warcraft | TCP, UDP | Some Blizzard games, Unofficial Club Penguin Disney online game for kids |
3784-3785 | Ventrilo VoIP | TCP, UDP | Ventrilo’s Voice over Internet Protocol program |
4333 | mSQL | TCP | Mini SQL server |
4444 | Blaster | TCP, UDP | Computer worm |
4500 | IPSec NAT Traversal | UDP | Internet Protocol Security Network Address Translation (NAT) Traversal |
4664 | Google Desktop | TCP | Google Desktop’s built-in HTTP server and indexing software |
4672 | eMule | UDP | Peer-to-peer file-sharing software |
4899 | Radmin | TCP | Remote computer control software |
5000 | UPnP | TCP | Universal Plug and Play |
5001 | iperf | TCP | Tool for measuring TCP and UDP bandwidth performance |
5004-5005 | RTP, RTSP | UDP | Real-time Transport Protocol, Real Time Streaming Protocol |
5050 | Yahoo! Messenger | TCP | Instant messaging service from Yahoo |
5060 | SIP | TCP, UDP | Session Initiation Protocol |
5061 | SIP-TLS | TCP | Session Initiation Protocol over TLS |
5190 | (Multiple uses) | TCP, UDP | ICQ, AIM (AOL Instant Messenger), Apple iChat |
5222-5223 | XMPP | TCP, UDP | Extensible Messaging and Presence Protocol Client Connection; also used in Google Talk, Jabber, Apple iChat, WhatsApp, etc. |
5353 | MDNS | UDP | Multicast DNS |
5432 | PostgreSQL | TCP | PostgreSQL database system |
5554 | Sasser | TCP | Computer worm |
5631-5632 | pcAnywhere | UDP | Symantec pcAnywhere |
5800 | VNC over HTTP | TCP | Virtual Network Computing (VNC) |
5900-5999 | RFB/VNC Server | TCP, UDP | VNC Remote Frame Buffer RFB protocol |
6000 | X11 | TCP | X Window System protocol for delivering payloads between X clients and servers |
6001 | X11 | UDP | X Window System protocol for delivering payloads between X clients and servers |
6112 | Diablo | TCP, UDP | Gaming |
6129 | DameWare | TCP | Remote access software developed by SolarWinds |
6257 | WinMX | UDP | Windows Music Exchange, peer-to-peer file-sharing freeware |
6346-6347 | Gnutella2 | TCP, UDP | Peer-to-peer network protocol |
6379 | Redis | TCP | Popular non-relational database management system (NoSql) |
6500 | GameSpy | TCP, UDP | Gaming |
6566 | SANE | TCP, UDP | Scanner Access Now Easy |
6588 | AnalogX | TCP | AnalogX proxy server |
6588 | HTTP Proxy | TCP | Common web proxy server ports: 80, 8080, 3128, 6588 |
6665-6669 | IRC | TCP | Internet Relay Chat |
6679, 6697 | IRC over SSL | TCP | Internet Relay Chat |
6699 | Napster | TCP | Peer-to-peer file-sharing application |
6881-6999 | BitTorrent | TCP, UDP | BitTorrent uses this range of ports the most often |
6891-6901 | Windows Live Messenger | TCP, UDP | Alternatively: MSN Messenger |
6970 | Quicktime | TCP, UDP | QuickTime streaming server |
7000 | Cassandra | TCP | Inter-node communication within the cluster on Apache Cassandra |
7001 | Cassandra | TCP | SSL-enabled inter-node communication within the cluster on Apache Cassandra |
7199 | Cassandra JMX | TCP | Java Management Extensions on Apache Cassandra |
7648-7649 | CU-SeeMe | TCP, UDP | Internet video conferencing client made by Cornell University |
8000 | Internet Radio | TCP | Commonly choice of alternate HTTP port for web applications |
8080 | HTTP Proxy | TCP | Common web proxy server ports: 80, 8080, 3128, 6588 |
8086 | Kaspersky AV | TCP | Kaspersky AV Control Center |
8087 | Kaspersky AV | UDP | Kaspersky AV Control Center |
8118 | Privoxy | TCP | Advertisement-filtering Web proxy |
8200 | VMware Server | TCP, UDP | VMware vSphere Fault Tolerance |
8222 | VMware Server | TCP, UDP | VMware Server Management User Interface (insecure Web interface). |
8500 | (Multiple uses) | TCP, UDP | Adobe ColdFusion, Flight Message Transfer Protocol |
8767 | Teamspeak | UDP | VoIP communication system for online gaming |
8866 | Bagle.B | TCP | Computer worm |
9042 | Cassandra | TCP | Apache Cassandra, a NoSql database |
9100 | PDL | TCP | PDL Data Stream, used for printing to certain network printers |
9101-9103 | Bacula | TCP, UDP | For automating backup tasks |
9119 | MXit | TCP, UDP | MXit Instant Messaging (deprecated) |
9800 | WebDAV | TCP, UDP | Web-based Distributed Authoring and Versioning, an extension of HTTP |
9898 | Dabber | TCP | Computer worm (Sasser) |
9999 | Urchin | TCP, UDP | Urchin Web Analytics |
10000 | (Multiple uses) | TCP, UDP | Network Data Management Protocol; applications: Webmin, BackupExec, Viatalk; gaming: The Matrix Online, Dungeon Fighter |
10161 | SNMP-agents (encrypted) | TCP | Simple network management protocol; agents communicate on this port |
10162 | SNMP-trap (encrypted) | TCP | Simple network management protocol; listens for asynchronous traps |
10113 | NetIQ | TCP, UDP | NetIQ Endpoint |
10114 | NetIQ | TCP, UDP | NetIQ Qcheck |
10115 | NetIQ | TCP, UDP | NetIQ Endpoint |
10116 | NetIQ | TCP, UDP | NetIQ VoIP Assessor |
11371 | OpenPGP | TCP, UDP | OpenPGP HTTP Keyserver |
12345 | NetBus | TCP | NetBus remote administration tool (Trojan horse) |
13720-13721 | NetBackup | TCP, UDP | NetBackup request daemon |
14567 | Battlefield | UDP | Gaming |
15118 | Dipnet/Oddbob | TCP | Trojan horse |
19226 | AdminSecure | TCP | Panda Software AdminSecure Communication Agent |
19638 | Ensim | TCP | Ensim Control Panel |
20000 | Usermin | TCP, UDP | Web email interface for regular non-root users |
24800 | Synergy | TCP, UDP | Keyboard/mouse sharing software |
25999 | Xfire | TCP | Communication tool for gamers (deprecated) |
27015 | Half-Life | UDP | Gaming |
27017 | MongoDB | TCP | NoSql database |
27374 | Sub7 | TCP, UDP | Trojan horse |
28960 | Call of Duty | TCP, UDP | Gaming |
31337 | Back Orifice | TCP, UDP | Remote administration tool used for Trojan horses |
33434+ | traceroute | UDP | Utility for displaying paths and measuring transit delays of packets across a network |
You may use these ports for custom applications free from concerns that it may clash with existing processes.
If you’re studying for IT certifications such as CCNA , focus on these ports:
Port number | Service |
---|---|
7 | Echo |
20, 21 | FTP |
22 | SSH/SCP |
23 | Telnet |
25 | SMTP |
53 | DNS |
67, 68 | DHCP/BOOTP |
69 | TFTP |
80 | HTTP |
88 | Kerberos |
110 | POP3 |
123 | NTP |
137 | NetBIOS |
143 | IMAP |
161 | SNMP |
194 | IRC |
389 | LDAP |
443 | HTTPS |
445 | Microsoft DS SMB |
464 | Kerberos password settings |
547 | DHCPv6 |
596 | SMSD |
636 | LDAP over SSL |
1720 | H.323 |
3389 | RDP |
5060 | SIP |
5061 | SIP over TLS |
We hope that you found this cheat sheet useful. Familiarity with ports and protocols is vital to building secure applications and troubleshooting problems on computer networks. Whether you're studying or working, this cheat sheet of common network ports will help you in academic and professional settings.
For further resources, or if you’re curious about how ports and protocols fit into cyber security, look into network security courses available with our StationX Accelerator Program .
FTP: ports 20-21; SSH/SCP: port 22; HTTP: 80; HTTPS: 443; POP3: 110; POP3 over SSL: 995; IMAP: 143; IMAP over SSL: 993. We recommend you download the graphic in Well-known/System Ports .
It depends on whether you’re referring to system ports (1024) or want to include ports registered with apps (49152) because system ports range from 0 through 1023, and registered ports span 1024 – 49151.
FTP: ports 20-21; SSH/SCP: port 22; Telnet: 23; SMTP: 25; DNS: 53; HTTP: 80; POP3: 110; IMAP: 143; HTTPS: 443.
FTP: port 21; SSH/SCP: 22; Telnet: 23; SMTP: 25; DNS: 53; POP3: 110; IMAP: 145; HTTP: 80; HTTPS: 443; MySQL: 3306; RDP: 3389; VNC: 5900.
The following are the three types of ports with corresponding port number ranges: • Well-known/System ports: 0 – 1023 • Registered ports: 1024 – 49151 • Dynamic/Private ports: 49152 – 65535
Nathan House is the founder and CEO of StationX. He has over 25 years of experience in cyber security, where he has advised some of the largest companies in the world. Nathan is the author of the popular "The Complete Cyber Security Course", which has been taken by over half a million students in 195 countries. He is the winner of the AI "Cyber Security Educator of the Year 2020" award and finalist for Influencer of the year 2022.
As the demand for skilled networking professionals continues to surge,
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Have you ever needed to run a command or program
If you’re aiming for the Amazon Web Services (AWS) Certified
Nathan, thank you for supplying this sheet. It comes in handy when you’re trying to remember what a particular port is used by.
Our pleasure.
Thank you, Nathan
This is a great single point to reference all default ports. Thank you!!!
Very good, it will be in front of me!
Ports on computers are required for networking, and without them, the computer would be completely isolated and it would be unable to communicate with other devices. So thank you for proving this list of the Common TCP and UDP Port numbers.
After resetting my router cause the password got changed and all the setting were changed to gain access to my computer. I spent about 20 minutes setting up the router. It appears the router never got set up from the cable company when it was installed. So if you have not done so lately check your router and settings.
Cool, Thanks for sharing!!
Sorry Nathan, i did not leave a comment for this “Common Ports” Chart last-week. I am glad i signed up to your news letter you are a good researcher. thank you for sharing with us all..
Nathan, I must thank you for these cheat sheets! They’ve been great on my learning and certification journey!
Thank you too!
Really really useful.Thanks a lot!!
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Last updated: March 18, 2024
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In the context of computer networks, a port is an endpoint for communication between applications (or network services). Each port has a port number for identification. Thus, a network service can use one or more ports by specifying their numbers.
By definition, there are 65,536 possible ports for use. However, many of them have a specific purpose or have already been assigned to some service. In this article, we’ll study how to choose a default port number for a new network service.
The main issue we have to deal with is choosing a port that’s not being used by any other service. Otherwise, there’s a good chance that our new service will eventually be executed on a machine with another service running on the same port. This would prevent both services from working.
To have a full view of the problem, we’ll first understand the subdivision of the port range. Next, let’s learn how to choose ports other than those used by well-known services. Then, we’ll see how to avoid conflicts with services running on our machine or the local network. Finally, we’ll briefly look at how to request an official assignment of the chosen port for our service if desired.
The full range of possible port numbers extends from 0 to 65535. However, properly using this large but limited port range requires global coordination. In this sense, RFC6335 designates the Internet Assigned Numbers Authority ( IANA ) as responsible for the assignment of these ports.
IANA handles port number assignments through procedures also specified in RFC6335. In short, the specification subdivides the full range of port numbers into three smaller ones. Each one of them is intended for different uses, as described in the table below:
Range Name | Port Numbers | Assignment |
---|---|---|
System Ports | 0 – 1023 | Assigned by IANA |
User Ports | 1024 – 49151 | Assigned by IANA |
Dynamic Ports | 49152 – 65535 | Never assigned |
System Ports and User Ports are available for assignment through IANA, which requires the IETF review or the IESG approval. However, the Dynamic Ports range has been specifically set aside for local and dynamic use, so it can’t be assigned through IANA.
The possible states for each port are Assigned, Unassigned, or Reserved. So, the only ports free to use are those with Unassigned state.
The System Ports range (also known as the Well-Known Ports) is both the smallest and the most densely assigned. So, the requirements for new port assignments in this range are much more strict than those for the User Ports range (also called Registered Ports). Therefore, ports in the System Ports range are only used by very well-known services and protocols.
Ports in the Dynamic Ports range are considered ephemeral ports, i.e., they’re only for temporary and dynamic use. Therefore, we should never use a port in this range as a service identifier since there’s no guarantee that ports will be available for the service.
Thus, in most cases, we should look for a free port in the User Ports range when choosing a default port for a new service.
Nowadays, there’s a wide range of network services (and protocols) used worldwide. Most of them are well-known services that have assigned ports in the IANA. Other services, although well-known, don’t have IANA-assigned ports for some reason.
Next, let’s see how to avoid selecting a port that services in both cases are already using.
For not choosing a port assigned by IANA, we need to check the IANA port number registry . It lists all port assignments and their respective services. In this case, the ports available are the ones that aren’t listed in the registry or have the Description field marked as Unassigned .
Given the large number of port assignments, it can be challenging to find available port numbers in the desired range. For convenience, we can download the IANA port number registry in CSV format and use the Python script list_iana_available_ports.py below to list the available ports in any given range.
To use the script above, we just need to run the command below, replacing <port-start> and <port-end> according to any range of our choice and <csv-file-name> with the actual name of the downloaded file.
It may be a good idea to select one or more of the available ports according to IANA. For example, we may use the provided script to find available ports ranging from 2000 to 3000 (which is a subrange of User Ports) and then select one or more ports.
After that, we can follow the next steps just to make sure that no other service is unofficially using the chosen port.
Some widely used services utilize ports that haven’t been officially assigned to them in the IANA registry. So, to avoid choosing a port used by one of these services too, we need to refer to an alternative (unofficial) but comprehensive listing.
An example of such a list is provided by NMAP.org . The NMAP list includes port assignments registered in IANA and others that have been detected by NMAP itself.
Thus, by accessing this list, we can check whether the port (or range) we selected in the previous step has also been identified by NMAP as frequently used by services. Since the port we’ve selected so far isn’t present in the NMAP list, we can follow the steps below to check further.
Besides avoiding conflicts with widely used services, we also need to ensure that the chosen port doesn’t create conflicts with our organization’s own services. Next, we’ll see how to avoid conflicts with other services on our local machine or local network.
Usually, Operating Systems (OS) have a file that maps services and their respective ports. Applications use it to convert human-readable service names into port numbers. Specifically, in Linux and MacOS, we can find this file at /etc/services , whereas, in Windows, its location is %windir%\System32\drivers\etc\services .
The services file includes the assignments made by IANA but also maps services related to the OS and others running on the local machine. For example, in a Debian-based distribution, the file includes a section named “Services added for the Debian GNU/Linux distribution” and another named “Local services”.
Hence, we can just open the file and search for the chosen port. So, if we don’t find the port in the file, we know that there are no local conflicts.
To check if another service on our local network is using the port we’ve chosen so far, we can use a network scanning tool. An example of such a tool is NMAP, which is widely used and available for various OSes , including Linux, Windows, and MacOS.
In short, NMAP has a command-line interface that expects some parameter (or command option) and a target host. The target host refers to the host that will be scanned. So, it can be a hostname or an IP address.
However, in our case, we don’t want to scan a specific target host but the whole network for open ports (ports being used by some service). Fortunately, the NMAP command line also supports multiple target hosts. There are many ways to do this , but one of the easiest is by using the CIDR notation.
This way, we can scan the entire network at once, specifying the target host in the format <network-ip-address>/<netmask> . For example, we can search for all open ports on the network 192.168.1.0/24 by typing the following command.
In addition, we can also scan only the port we’ve chosen later. The command below exemplifies a search for hosts using port 3000 on the network 192.168.1.0/24 .
Once we’ve chosen a port that’s currently available, we can request that the port be assigned to our service if we so desire. However, we should do this only if the service is genuinely distinct. Otherwise, IANA will probably not approve the port assignment.
For example, if the service is a new web application, instead of requesting a new port assignment, we should use the ports already assigned for this kind of service (such as 80 for HTTP and 443 for HTTPS).
Nevertheless, to make the request, we can submit an application for port assignment through the official IANA form .
In this article, we learn how to choose a port for a new network service. A good choice requires in-depth investigation to avoid choosing a port that’s already in use by another service.
The first step is to check the IANA port assignment registries. After that, we can consult unofficial registries and local port mappings and scan the network for ports in use.
In conclusion, these are the key steps to selecting a port number for a new network service, ensuring effective communication.
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Tags: documentation | management, network documentation series: port mapping, john w kerns.
You can download this article’s template file using the link to the right.
The first question to ask when deciding to create a port mapping is which details should you record. The answer completely depends on your specific environment and what you plan to do with the documentation. Different requirements demand different data to be collected. I recommend you identify what you would like to do with this documentation before collecting and creating it. All that being said, the template linked to on this post contains a baseline of the most common data points which can provide a solid starting point.
Type This field details the layer-1 and layer-2 media and protocols used on the wire. Layer-1 can be things like RJ45, OM2 (SC), OS1 (LC), etc. Layer-2 can be things like Ethernet, PPP, or God forbid, Frame Relay.
Source Device Hostname & Port These fields record the hostname and port information of the source device. Whenever possible, I will use the port name as it is seen in the configuration terminal of the device.
***NOTE*** In case you are wondering the difference between the source device and the destination device, there really is no difference other than the fact that the focus of the document is always on the source device. In other words, the complete listing of ports for a device can be found in the section of the document where it is focused on as the source.
Patch Panel Fabric & Port When there is infrastructure cabling used in-between the source and destination device: it is handy to note down which patch panel and port is used for the connection. The “Fabric” column can be replaced with “Panel Name” or anything else which specifies the infrastructure cabling extension set.
Destination Hostname & Port This field defines the remote (non-focused) device and port where the connection terminates. When the port on the source device is empty and unused, these fields will be blank.
Destination Device Notes These fields can be used for notations about the destination device including information about its role, purpose, and if the documented link is in an aggregated group (port-channel).
Scripting Columns The scripting columns are used to generate configuration scripts using the information contained in the other columns. The scripting columns in the template are set up to generate port descriptions for Cisco based switches and will automatically detect when the different “Notes” fields are populated.
Make sure to visit the homepage for this series Network Documentation Series: Preamble and review the generic documentation tips listed there which apply to all network-related documents.
About John W Kerns: John Kerns is a network and automation engineer for a VAR based in Southern California and has been in the industry for over 12 years. He maintains a few open-source projects on GitHub and writes for Packet Pushers.
A port number is a way to identify a specific process to which an internet or other network message is to be forwarded when it arrives at a server . All network-connected devices come equipped with standardized ports that have an assigned number. These numbers are reserved for certain protocols and their associated function. Hypertext Transfer Protocol ( HTTP ) messages, for example, always go to port 80 -- one of the most commonly used ports.
Developers of the Advanced Research Projects Agency Network , an informal cooperation of system administrators and software authors, proposed the concept of port numbers. Once known as socket numbers , the early incarnation of port numbers is similar to the Internet Protocol ( IP ) address class used today.
An IP address identifies a machine in an IP network and is used to determine the destination of a data packet . Port numbers identify a particular application or service on a system.
An IP address is a logical address used to identify a device on the network. Any device connected to the internet is assigned a unique IP address for identification. This identifying information enables devices to communicate over the internet.
Port numbers are part of the addressing information that helps identify senders and receivers of information and a particular application on the devices. Port numbers consist of 16- bit numbers.
For example, a user request for a file transfer from a client , or local host, to a remote server on the internet uses File Transfer Protocol (FTP) for the transaction. Both devices must be configured to transfer files via FTP . To transfer the file, the Transmission Control Protocol ( TCP ) software layer in local host identifies the port number of 21, which, by convention, associates with an FTP request -- in the 16-bit port number integer that is appended to the request.
At the server, the TCP layer will read port number 21 and forward the request to the FTP program at the server.
There are 65,535 port numbers, but not all are used every day.
Restricted port numbers or well-known port numbers are reserved by prominent companies and range from 0 to 1023. Apple QuickTime, Structured Query Language services and Gopher services use some of these restricted ports.
Those who want to register a specific port number can choose from 1024 to 49151. Software companies typically register these port numbers. Dynamic or private ports ranging from 49152 to 65536 are available for anyone to use.
In another scenario, a port number is assigned temporarily -- for the duration of the request and its completion -- from a range of assigned port numbers. This is called a temporary port number .
Here are some commonly used ports and their associated networking protocols:
The Internet Assigned Numbers Authority allocates and maintains all the port numbers listed above.
What is the port number for localhost.
Localhost is the default name used to establish a connection with a computer. The IP address is usually 127.0.0.1. This is done by using a loopback address network. Port 80 is the common standard port for HTTP.
Port number 8080 is usually used for web servers . When a port number is added to the end of the domain name, it drives traffic to the web server. However, users can not reserve port 8080 for secondary web servers.
TCP/IP networks use port 3360. The connection-oriented protocol TCP demands handshaking to set up end-to-end communications. Upon establishing the connection, user data is transferred bidirectionally over the connection.
The easiest way to find a router 's public IP address is to search "what is my IP?" on a search engine like Google. Identifying a port number will depend on the operating system.
For Windows:
A proxy server is, essentially, a computer on the internet with its own IP address. It sits between the client device and the remote server and acts as an intermediary to handle communication requests over the internet.
When a local computer sends a web request, it automatically goes through the proxy server. The proxy server uses its own IP address for the web request and not the user's. Proxy servers offer privacy benefits -- for example, the ability to change the client IP address, masking the user's location.
The proxy server address includes an IP address with the port number attached to the end of the address. The port number 8080 is usually used for web servers, proxy and caching .
Gmail uses both Internet Message Access Protocol ( IMAP ) and SMTP. The IMAP port is 993, and the SMTP port is 25.
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Port # | Protocol | Description | Status |
---|---|---|---|
0 | TCP, UDP | Reserved; do not use (but is a permissible source port value if the sending process does not expect messages in response) | Official |
1 | TCP, UDP | TCPMUX | Official |
5 | TCP, UDP | RJE (Remote Job Entry) | Official |
7 | TCP, UDP | ECHO protocol | Official |
9 | TCP, UDP | DISCARD protocol | Official |
11 | TCP, UDP | SYSTAT protocol | Official |
13 | TCP, UDP | DAYTIME protocol | Official |
17 | TCP, UDP | QOTD (Quote of the Day) protocol | Official |
18 | TCP, UDP | Message Send Protocol | Official |
19 | TCP, UDP | CHARGEN (Character Generator) protocol | Official |
20 | TCP | FTP Protocol (data) - port for transferring FTP data | Official |
21 | TCP | FTP Protocol (control) - port for FTP commands and flow control | Official |
22 | TCP, UDP | SSH (Secure Shell) - used for secure logins, file transfers (scp, sftp) and port forwarding | Official |
23 | TCP, UDP | Telnet protocol - unencrypted text communication, remote login service | Official |
25 | TCP, UDP | SMTP (Simple Mail Transport Protocol) - used for email routing between email servers | Official |
26 | TCP, UDP | RSFTP - A simple FTP-like protocol | Unofficial |
35 | TCP, UDP | QMS Magicolor 2 printer | Unofficial |
37 | TCP, UDP | TIME protocol | Official |
38 | TCP, UDP | Route Access Protocol | Official |
39 | TCP, UDP | Resource Location Protocol | Official |
41 | TCP, UDP | Graphics | Official |
42 | TCP, UDP | Host Name Server/WINS Replications | Official |
43 | TCP | WHOIS protocol | Official |
49 | TCP, UDP | TACACS Login Host protocol | Official |
53 | TCP, UDP | DNS (Domain Name System) | Official |
57 | TCP | MTP, Mail Transfer Protocol | Official |
67 | UDP | BOOTP (BootStrap Protocol) server; also used by DHCP | Official |
68 | UDP | BOOTP (BootStrap Protocol) client; also used by DHCP | Official |
69 | UDP | TFTP (Trivial File Transfer Protocol) | Official |
70 | TCP | Gopher protocol | Official |
79 | TCP | Finger protocol | Official |
80 | TCP | HTTP (HyperText Transfer Protocol) - used for transferring web pages | Official |
81 | TCP | Torpark - Onion routing ORport | Unofficial |
82 | UDP | Torpark - Control Port | Unofficial |
88 | TCP | Kerberos - authenticating agent | Official |
101 | TCP | HOSTNAME | |
102 | TCP | ISO-TSAP protocol/Microsoft Exchange | |
107 | TCP | Remote Telnet Service | |
109 | TCP | POP, Post Office Protocol, version 2 | |
110 | TCP | POP3 (Post Office Protocol version 3) - used for retrieving emails | Official |
111 | TCP, UDP | SUNRPC protocol | |
113 | TCP | Ident - old server identification system, still used by IRC servers to identify its users | Official |
115 | TCP | SFTP, Simple File Transfer Protocol | |
117 | TCP | UUCP-PATH | |
118 | TCP, UDP | SQL Services | Official |
119 | TCP | NNTP (Network News Transfer Protocol) - used for retrieving newsgroups messages | Official |
123 | UDP | NTP (Network Time Protocol) - used for time synchronization | Official |
135 | TCP, UDP | EPMAP / Microsoft RPC Locator Service | Official |
137 | TCP, UDP | NetBIOS NetBIOS Name Service | Official |
138 | TCP, UDP | NetBIOS NetBIOS Datagram Service | Official |
139 | TCP, UDP | NetBIOS NetBIOS Session Service | Official |
143 | TCP, UDP | IMAP4 (Internet Message Access Protocol 4) - used for retrieving emails | Official |
152 | TCP, UDP | BFTP, Background File Transfer Program | |
153 | TCP, UDP | SGMP, Simple Gateway Monitoring Protocol | |
156 | TCP, UDP | SQL Service | Official |
157 | TCP, UDP | KNET VM Command Message Protocol | |
158 | TCP, UDP | DMSP, Distributed Mail Service Protocol | |
159 | TCP, UDP | NSS-Routing | |
160 | TCP, UDP | SGMP-TRAPS | |
161 | TCP, UDP | SNMP (Simple Network Management Protocol) | Official |
162 | TCP, UDP | SNMPTRAP | Official |
170 | TCP | Print-srv | |
179 | TCP | BGP (Border Gateway Protocol) - an exterior gateway routing protocol that enables groups of routers to share routing information to ensure efficient and loop-free routes can be established. BGP is commonly used within and between ISPs. | Official |
190 | TCP, UDP | Gateway Access Control Protocol (GACP) | |
191 | TCP, UDP | Prospero Directory Service | |
192 | TCP, UDP | OSU Network Monitoring System, Apple AirPort Base Station PPP status or discovery, AirPort Admin Utility or Express Assistant | |
192 | TCP. UDP | SRMP (Spider Remote Monitoring Protocol) | |
194 | TCP | IRC (Internet Relay Chat) | Official |
201 | TCP, UDP | AppleTalk Routing Maintenance | |
209 | TCP, UDP | The Quick Mail Transfer Protocol | |
213 | TCP, UDP | IPX | Official |
218 | TCP, UDP | MPP, Message Posting Protocol | |
220 | TCP, UDP | IMAP, Interactive Mail AccessProtocol, version 3 | |
259 | TCP, UDP | ESRO, Efficient Short Remote Operations | |
264 | TCP, UDP | BGMP, Border Gateway Multicast Protocol | |
311 | TCP | Apple Server-Admin-Tool, Workgroup-Manager-Tool | |
318 | TCP, UDP | TSP, Time Stamp Protocol | |
323 | TCP, UDP | IMMP, Internet Message Mapping Protocol | |
383 | TCP, UDP | HP OpenView HTTPs Operations Agent | |
366 | TCP, UDP | SMTP, Simple Mail Transfer Protocol. On-Demand Mail Relay (ODMR) | |
369 | TCP, UDP | Rpc2portmap | Official |
371 | TCP, UDP | ClearCase albd | Official |
384 | TCP, UDP | A Remote Network Server System | |
387 | TCP, UDP | AURP, AppleTalk Update-Based Routing Protocol | |
389 | TCP, UDP | LDAP (Lightweight Directory Access Protocol) | Official |
401 | TCP, UDP | UPS Uninterruptible Power Supply | Official |
411 | TCP | Direct Connect Hub port | Unofficial |
427 | TCP, UDP | SLP (Service Location Protocol) | Official |
443 | TCP | HTTPS - HTTP Protocol over TLS/SSL (used for transferring web pages securely using encryption) | Official |
444 | TCP, UDP | SNPP, Simple Network Paging Protocol | |
445 | TCP | Microsoft-DS (Active Directory, Windows shares, Sasser worm, Agobot, Zobotworm) | Official |
445 | UDP | Microsoft-DS SMB file sharing | Official |
464 | TCP, UDP | Kerberos Change/Set password | Official |
465 | TCP | SMTP over SSL - CONFLICT with registered Cisco protocol | Conflict |
500 | TCP, UDP | ISAKMP, IKE-Internet Key Exchange | Official |
512 | TCP | exec, Remote Process Execution | |
512 | UDP | comsat, together with biff: notifies users of new c.q. yet unread e-mail | |
513 | TCP | Login | |
513 | UDP | Who | |
514 | TCP | rsh protocol - used to execute non-interactive commandline commands on a remote system and see the screen return | |
514 | UDP | syslog protocol - used for system logging | Official |
515 | TCP | Line Printer Daemon protocol - used in LPD printer servers | |
517 | TCP | Talk | |
518 | UDP | NTalk | |
520 | TCP | efs | |
520 | UDP | Routing - RIP | Official |
513 | UDP | Router | |
524 | TCP, UDP | NCP (NetWare Core Protocol) is used for a variety things such as access to primary NetWare server resources, Time Synchronization, etc. | Official |
525 | UDP | Timed, Timeserver | |
530 | TCP, UDP | RPC | Official |
531 | TCP, UDP | AOL Instant Messenger, IRC | |
532 | TCP | netnews | |
533 | UDP | netwall, For Emergency Broadcasts | |
540 | TCP | UUCP (Unix-to-Unix Copy Protocol) | |
542 | TCP, UDP | commerce (Commerce Applications) | |
543 | TCP | klogin, Kerberos login | |
544 | TCP | kshell, Kerberos Remote Shell | |
546 | TCP, UDP | DHCPv6 client | |
547 | TCP, UDP | DHCPv6 server | |
548 | TCP | AFP (Apple Filing Protocol) | |
550 | UDP | new-rwho, new-who | |
554 | TCP, UDP | RTSP (Real Time Streaming Protocol) | Official |
556 | TCP | Remotefs, rfs, rfs_server | |
560 | UDP | rmonitor, Remote Monitor | |
561 | UDP | monitor | |
561 | TCP, UDP | chcmd | |
563 | TCP, UDP | NNTP protocol over TLS/SSL (NNTPS) | Official |
587 | TCP | Email message submission (SMTP) (RFC 2476) | Official |
591 | TCP | FileMaker 6.0 Web Sharing (HTTP Alternate, see port 80) | Official |
593 | TCP, UDP | HTTP RPC Ep Map/Microsoft DCOM | Official |
604 | TCP | TUNNEL | |
631 | TCP, UDP | IPP, Internet Printing Protocol | |
636 | TCP, UDP | LDAP over SSL (encrypted transmission) | Official |
639 | TCP, UDP | MSDP, Multicast Source Discovery Protocol | |
646 | TCP | LDP, Label Distribution Protocol | |
647 | TCP | DHCP Failover Protocol | |
648 | TCP | RRP, Registry Registrar Protocol | |
652 | TCP | DTCP, Dynamic Tunnel Configuration Protocol | |
654 | TCP | AODV, Ad hoc On-Demand Distance Vector | |
665 | TCP | sun-dr, Remote Dynamic Reconfiguration | Unofficial |
666 | UDP | Doom, First online FPS | |
674 | TCP | ACAP, Application Configuration Access Protocol | |
691 | TCP | Microsoft Exchange Routing | Official |
692 | TCP | Hyperwave-ISP | |
695 | TCP | IEEE-MMS-SSL | |
698 | TCP | OLSR, Optimized Link State Routing | |
699 | TCP | Access Network | |
700 | TCP | EPP, Extensible Provisioning Protocol | |
701 | TCP | LMP, Link Management Protocol. | |
702 | TCP | IRIS over BEEP | |
706 | TCP | SILC, Secure Internet Live Conferencing | |
711 | TCP | TDP, Tag Distribution Protocol | |
712 | TCP | TBRPF, Topology Broadcast based on Reverse-Path Forwarding | |
720 | TCP | SMQP, Simple Message Queue Protocol | |
749 | TCP, UDP | kerberos-adm, Kerberos administration | |
750 | UDP | Kerberos version IV | |
782 | TCP | Conserver serial-console management server | |
829 | TCP | CMP (Certificate Management Protocol) | |
860 | TCP | iSCSI | |
873 | TCP | rsync - File synchronisation protocol | Official |
901 | TCP | Samba Web Administration Tool (SWAT) | Unofficial |
902 | VMware Server | Unofficial | |
911 | TCP | Network Console on Acid (NCA) - local tty redirection over OpenSSH | |
981 | TCP | SofaWare Technologies Remote HTTPS management for firewall devices running embedded Checkpoint Firewall-1 software | Unofficial |
989 | TCP, UDP | FTP Protocol (data) over TLS/SSL | Official |
990 | TCP, UDP | FTP Protocol (control) over TLS/SSL | Official |
991 | TCP, UDP | NAS (Netnews Admin System) | |
992 | TCP, UDP | Telnet protocol over TLS/SSL | Official |
993 | TCP | IMAP4 over SSL (encrypted transmission) | Official |
995 | TCP | POP3 over SSL (encrypted transmission) | Official |
A Comprehensive Illustrated Internet Protocols Reference
Fluent in TCP/IP Funny Networking T-Shirt
TCP/IP Illustrated, Volume 1: The Protocols
The IP address identifies the device e.g. computer.
However an IP address alone is not sufficient for running network applications, as a computer can run multiple applications and/or services .
Just as the IP address identifies the computer, The network port identifies the application or service running on the computer.
The use of ports allow computers/devices to run multiple services/applications .
The diagram below shows a computer to computer connection and identifies the IP addresses and ports.
If you use a house or apartment block analogy the IP address corresponds to the street address.
All of the apartments share the same street address.
However each apartment also has an apartment number which corresponds to the Port number.
A port number uses 16 bits and so can therefore have a value from 0 to 65535 decimal
Port numbers are divided into ranges as follows:
Port numbers 0-1023 – Well known ports. These are allocated to server services by the Internet Assigned Numbers Authority (IANA). e.g Web servers normally use port 80 and SMTP servers use port 25 (see diagram above).
Ports 1024-49151- Registered Port -These can be registered for services with the IANA and should be treated as semi-reserved. User written programs should not use these ports.
Ports 49152-65535 – These are used by client programs and you are free to use these in client programs. When a Web browser connects to a web server the browser will allocate itself a port in this range. Also known as ephemeral ports .
A connection between two computers uses a socket.
A socket is the combination of IP address plus port
Imagine sitting on your PC at home, and you have two browser windows open.
One looking at the Google website, and the other at the Yahoo website.
The connection to Google would be:
Your PC – IP1 +port 60200 ——– Google IP2 +port 80 (standard port)
The combination IP1+60200 = the socket on the client computer and IP2 + port 80 = destination socket on the Google server.
The connection to Yahoo would be:
your PC – IP1 +port 60401 ——–Yahoo IP3 +port 80 (standard port)
The combination IP1+60401 = the socket on the client computer and IP3 + port 80 = destination socket on the Yahoo server.
Notes : IP1 is the IP address of your PC. Client port numbers are dynamically assigned, and can be reused once the session is closed.
Note : You may find reading the article on the TCP/IP protocol suite useful to understand the following
IP addresses are implemented at the networking layer which is the IP layer.
Ports are implemented at the transport layer as part of the TCP or UDP header as shown in the schematic below:
The TCP/IP protocol supports two types of port- TCP Port and UDP Port .
TCP – is for connection orientated applications. It has built in error checking and will re transmit missing packets.
UDP – is for connection less applications. It has no has built in error checking and will not re transmit missing packets.
Applications are designed to use either the UDP or TCP transport layer protocol depending on the type of connection they require.
For example a web server normally uses TCP port 80 .
It can use any port, but the web server application is designed to use a TCP connection. See TCP vs UDP
Here is a very good video that explains ports and sockets really well
Windows and Linux systems have a utility called netstat which will give you a list of open ports on your computer.
These articles show you how to use netstat on windows and on linux .
You can check the port status of remote machines using a port scanner line nmap .
You can install NMAP on windows,Linux and Apple. It can be used with a graphical user interface of as a command line tool.
Here is a useful article on using NMAP from the command line .
Here is a good video on using Nmap and also covers TCP/IP connection procedures which is useful for understanding ports.
References and resources:
TCP and UDP basics -Connecting to a website- This is for programmers but there is no coding just an explanation of ports and sockets.
Connection states – if you are wondering what established and listening and the other state descriptions mean. here is a good state diagram that it refers to.
Online port tester Collection of tools for port scanning and web server testing.
Related Articles:
I created an inbound UDP port (10512); but I am not able to see this port. I also tried creating other ports in the noted range with out any success. Registered Ports: 1024 through 49151 portqry —-> UDP port 10512 (unknown service): NOT LISTENING Thanks for any clarification
Have you tried writing a program to send/receive data on that port.What utility are you using to view the ports. Rgds
Sorry, no time to research and develop a program. it would nice. I am trying to use online tools. I think that I just learned that portqry works great for TCP. I am trying to use iperf3; however not enough hands on as of yet. I see that iperf3 created inbound rule TCP and UDP. I deleted the TCP. I need more flying hours. iperf3 -s -p 10512 ———————————————————– Server listening on 10512 ———————————————————– I am also trying to use netstat to see if the port is listening; however no progress on that end. netstat -ab
netsh firewall show state netsh will show UDP port on client computer with Win 11 PRO but not on the server 2019.
thanks for any input
client side >iperf3 -c 10.241.71.38 -u -p 10512 -b 10M
I’ve decided to try to mess around with port forwarding as a means to try to get me and my friend who live in the same town and use the same internet provider (Spectrum) to be able to connect to each other in games that do not have dedicated servers. Spectrum’s peer-to-peer is absolute trash, and we can never connect to each other playing games like Risk of Rain 2, Elden Ring, etc. I’m trying to find a port that would help us overcome the connection issues. Any advice?
I’m not a gamer and so I have never experienced these issues. However games have their own ports have you checked on the required ports for these games? Rgds Steve
Hi Steve, I have a requirement. We have a web application which is connected to a mobile/Android POS device. This web application connects via TCPIP. As of today, we have the connections that are initiated from the device. the URL and port # of the web server is configured in the device and the connection is initiated from the device. Web application will respond to a request from the device. We now want to initiate the request from the server. Can we add another port # for this new communication? Similarly, there is a 3rd communication that happens from the device on timed intervals. For this, we want to use a 3rd port. Is this a possible solution for this? Happy to discuss this separately too.
I assume that you are talking about a web server. A web server cannot start a connection. Rgds Steve
Respected Sir Thank you so much for this informative article. I am a first year IT student. Sir , if I visit any particular website for 15 minutes and visit various sections of this website (feedback/ contact us / about us etc) in such case, does my visit to various sections is considered as a single connection/ single session or they are considered as multiple connections / multiple sessions to this website? Also what is the role of session ID in TCP IP communication along with port and socket Thank you Sir Bhavesh
It is a single TCP/IP connection. If you close the tab and then revisit by typing in the url then you will get a new connection.
Just out of curiosity, if the user visits different pages on the website, won’t these be over a new TCP connection every time unless a long-lived HTTP is used?
No they will be a single connection just a different get command. HTTP now hold the connection open by default until you close the browser tab. Rgds Steve
Thanks Steve for making it vividly simple.
I have a problem with an application that uses fixed source ports in the communication with the server. If the communication ends for some reason the clients tries to put the communication up again using the same source port. The problem is that the server have not gotten a fin packet that takes down the communication and it still listens for the communication from the client in a ESTABLISHED status if you run netstat -a on the server. If the client had not used fixed ports I would think that the communication would reconnect with a new session because the client had used “+1” on its source port and the server would connect the communication with a new socket.
Is there a “best practice” rfc that explains why it is not a good idea to use fixed ports?
Not that I am aware.
Wonderful, I’ve sent it over email along with some info It runs on Ubuntu Thank you for your time on this and God bless Al
I have a software which creates 4 sockets with apparently random numbers (the person who developed left no documentation)
However, the client which connects to it only sends over port 9091
Is there a way to interconnect those random number sockets and port 9091 so the client is able to connect to the software?
Thanks in advance and God bless
Hi It sounds like the software is supposed to be a server which usually has fixed ports. What does the software do?
It receives video data, connects to a MariaDB server, and serves as an API to it, receiving calls from a mobile app and sending customer data back
I wonder if the reason why it opens 4 sockets is to receive and send video data and receive and send customer data
Either way, the problem is that it creates sockets of random numbers instead of a 9091 port which is what the android app uses
Below its log, hope that sheds some light and thanks
[0121/06/01 12:55:01][0000-00000001] SDSS int server v1.2.0 – b6 (01/03/2021) run up at Thu Jul 1 12:55:01 2021 [0121/06/01 12:55:01][0000-00000002] debug level set to 99 [0121/06/01 12:55:01][0000-00000003] args[ ./dvis -d99 ] [0121/06/01 12:55:01][0000-00000004] startup info follows: [0121/06/01 12:55:01][0000-00000005] stdin handle 0 [0121/06/01 12:55:01][0000-00000006] openSQL( 0x5f687580 ) [0121/06/01 12:55:01][0000-00000007] openSQL: Connection successful to ‘127.0.0.1’ as ‘sa’ [0121/06/01 12:55:01][0000-00000008] hostname being used is ‘stipra.com’ [0121/06/01 12:55:01][0000-00000009] get_ipaddress() [0121/06/01 12:55:01][0000-00000010] lo IP Address 127.0.0.1 [0121/06/01 12:55:01][0000-00000011] wlo1 IP Address 192.168.1.142 [0121/06/01 12:55:01][0000-00000012] lo IP Address ::1 [0121/06/01 12:55:01][0000-00000013] wlo1 IP Address fe80::d6a7:186d:aa86:5311 [0121/06/01 12:55:01][0000-00000014] get_ipaddress: returning an IP4 address of 192.168.1.142 [0121/06/01 12:55:01][0000-00000015] Running on server stipra.com IP address 192.168.1.142 [0121/06/01 12:55:01][0000-00000016] setsockopt returned 0, errno 11 [0121/06/01 12:55:01][0000-00000017] sockets created [0121/06/01 12:55:01][0000-00000018] 63420 [0121/06/01 12:55:01][0000-00000019] 29616 [0121/06/01 12:55:01][0000-00000020] 6052 [0121/06/01 12:55:01][0000-00000021] 43464 [0121/06/01 12:55:01][0000-00000022] wait_for_cmd(0x1) [0121/06/01 12:55:01][0000-00000023] stdin(0) [0121/06/01 12:55:01][0000-00000024] recv_d( 0, 0x7f90fdd4e010, 8 ) [0121/06/01 12:56:01][0000-00000025] recv_d: Select timeout, retrying [0121/06/01 12:57:01][0000-00000026] recv_d: Select timeout, retrying [0121/06/01 12:58:01][0000-00000027] recv_d: Select timeout, retrying [0121/06/01 12:59:01][0000-00000028] recv_d: Select timeout, retrying [0121/06/01 13:00:01][0000-00000029] recv_d: Select timeout, retrying [0121/06/01 13:01:01][0000-00000030] recv_d: Select timeout, retrying [0121/06/01 13:02:01][0000-00000031] recv_d: Select timeout, retrying [0121/06/01 13:03:01][0000-00000032] recv_d: Select timeout, retrying [0121/06/01 13:04:01][0000-00000033] recv_d: Select timeout, retrying [0121/06/01 13:05:01][0000-00000034] recv_d: Select timeout, retrying [0121/06/01 13:06:01][0000-00000035] recv_d: Select timeout, retrying [0121/06/01 13:07:01][0000-00000036] recv_d: Select timeout, retrying [0121/06/01 13:08:01][0000-00000037] recv_d: Select timeout, retrying [0121/06/01 13:09:01][0000-00000038] recv_d: Select timeout, retrying [0121/06/01 13:10:01][0000-00000039] recv_d: Select timeout, retrying [0121/06/01 13:10:01][0000-00000040] wait_for_cmd: Initial receive is not 8 bytes [0121/06/01 13:10:01][0000-00000041] pipe broken exiting
Sorry don’t know, It looks like it is creating client connections but not sure what to. When you say it receives video data I assume that that is coming in on a port. The database would need another. The mobile app is used to view the video I assume. Is any part of it working. Where is the mobile App located(internet or same network). Is this a standard kit or is it put together by yourself? Rgds Steve
The software creates 4 sockets with random port numbers but none of them are the port 9091 which the APP uses. The mobile App is on the internet.
The software connects to a tunnel connection 10.8.0.0, which leads me to believe it requires the creation of some kind of tunnel to capture anything received from the internet on port 9091 from 192.168.1.142 and forward it to those 4 sockets through some kind of dynamic port forwarding thing or something like that
I tried to use ssh -D 192.168.1.142:9091 -N -f [email protected] and I am able to telnet 192.168.1.142 and connect the app, but no data seems to go or come back 🙁
The software connects to the database, and that’s actually the only thing it is doing well
Does it have any setup instructions. Is it off the shelf software and does it have a website that I can take a look at. Rgds Steve
It is a bespoke software made by a person who left the company and never left any documentation. It is developed in C++ 32 bits I can send it to your email which I believe is [email protected] as it is rather small, along with how to run itm (the little I know at least)
That email will work is it for windows or linux?
Hi, I have a question, is it possible for me to run 2 applications and connect to different ip but using same port number (example 6000) ?
Yes you are doing that when you connect to two different websites as they both use port 80 rgds steve
So I have a question. Let’s say there is a webserver A which hosts a website and that server A has the port 443 open and let’s say I have written a code as part of a webpage on that website and that code connects to a remote server B to get some data. Can server A somehow restrict me and only allow connections to the port 443 on the remote server B and not allow me to connect me to any other port on remote server B? Have you seen such a restriction before and if yes then what would be the reason behind such a restriction? Thank you
Not quite sure exactly what restriction you mean but you can restrict on destination port and ip and source port and IP if that helps rgds steve
Hi Steve, So here is the scenario. The webserver A has the port 443 open for any incoming requests. The webserver A hosts a website and one of the pages of that website has C# code which makes API calls to a remote server B. I was told by the network admin of Webserver A that the C# API call should be made only to the port 443 of the remote server B. Currently the remote server B has port 7093 open and it’s listening to any API requests on that port. So my questions are:- 1. Is it possible for the network admin to disallow API calls to ports other than 443? 2. What could be the reason for such a restriction? After all, how can restricting a destination port give you any sort of advantage? Port is just a number on which the server listens. Please help. Thank you
Yes you can filter incoming traffic on port, ip address and protocol even on basic firewalls. Restricting ports is for security reasons Rgds Steve
Minor formatting issue: “{outline]Each end of the connection will have a socket.{/outline]”
Tks for pointing that out. Rgds Steve
Very well explained, thanks a lot!
Steve, this was very well explained, thank you.
Thank you very much! Realy clear explanation.
I want to read a data from a machine which supports open protocol if the machine is in network and if I know IP address and port number(socket) how can I read a data from it(I know it send and receive data in packet format )
Hi not sure what you mean by supports open protocol. Rgds Steve
Thank you, Steve! Is it possible with TCP/IP sockets to send requests to one IP:PORT and listen for responses on a different IP:PORT. E.g. we want to send to a load balancer IP but listen for response on localhost.
Hi Not quite sure of what you mean exactly but load balancing is quite common. This might help https://www.citrix.com/glossary/load-balancing.html
Question: When a program on your computer sends or receives data over the Internet it sends that data to an ip address and a specific port on the remote computer. How does my computer know what port a specific application is working on another computer to populate the TCP Header?
When Machine A connects to machine B. The source ip and port are contained in the connection packet as well as the destination port and IP address. The IP packet contains the ip addresses and the tcp layer contains the port numbers see https://en.wikipedia.org/wiki/IPv4 https://en.wikipedia.org/wiki/Transmission_Control_Protocol
Hi Steve, Thanks for the tutorial can you please help me with the following issue I have multiple devices connected to the same network and I want to transfer data across them, how can I transmit the data the IP of some devices changes after a particular time I can keep the port number constant but the devices don’t know each others IP address and also I don’t want to use UDP because it is not reliable
Hi You need to use DNS.Because the IP changes you need dynamic DNS. Most devices have MDNS enabled. See this article on my other site https://stevessmarthomeguide.com/name-resolution-and-dns-on-home-networks/ To seen if mdns is working try ping computer_name.local However the easiest solution is to give them static IP addresses. Rgds Steve
Great site. I have a quick question. If I receive a UDP datagram using recvmsg(), will the msghdr structure be filled out with the sender’s IP and port (in the msg_name field, which is a sockaddr struct)?
Many thanks.
Hi Haven’t programmed c with UDP but according to IBM then yes for ip address but doesn’t mention the port. https://www.ibm.com/support/knowledgecenter/en/SSLTBW_2.1.0/com.ibm.zos.v2r1.hala001/rcvm.htm rgds steve
hi ,I have some questions When using TCP protocol, the client must use in its message the IP address and Port number of the server. And it must also include its own IP address and port number. why?
4- When using UDP protocol, the client is required to use in its message the IP address and Port number of the server. But it is not required to include its own IP address and port number.why?
TCP is a connection orientated protocol and so the destination device needs to know who to send a reply to. UDP is connectionless and so doesn’t require a response and hence the source IP address is optional. Rgds Steve
really very useful..thanks for your explanation
Can Server and client share the port number, eg : Server is listening at port num : 51001 and client also listens on the same port num : 510001 .
Can you pls explain this
Yes providing they are on different hardware. A port is simply a door into the machine the numbers themselves aren’t really important except for the conventions already adopted and standardised. Machines use 16bits for the port numbers hence the limitation of 64,000.
16 bits = 1+2+4+8+16+32+64+128+256+512+1024+2048+4096+8192+16384+32768 = 65535
Good job Steve. I have a question, and it goes like this: if i have 2 browsers from my PC connecting to the same service, for example both browsers are connecting to google.com, does that mean that the two browsers from my computer are connecting to the same socket in the google server? Meaning can more than one socket connect to a socket at the same time?
Yes they use the same IP and port on the Google server but different ports on the client. rgds steve
Hi, Thanks for this information sharing. It is very well explained. I have following doubt, What I understand is TCP protocol takes care of data transmission error that duplication of packets or packet in true form delivered to other end. This is not done in UDP protocol. But when I see the Schematic of TCP, UDP & IP in your article I do not find any block for error checking in TCP where as UDP has checksum. Could you please clear my doubt.
The TCP packet also has a checksum which isn’t shown in my schematic you can see the full structure on wiki https://en.wikipedia.org/wiki/Transmission_Control_Protocol However it is the ack and nack messages that are responsible or making sure all of the data is received. Rgds Steve
In above example, google application/service and yahoo application/service both uses same port number i.e:80. Then there should be ambiguity that is to which application/service it should refer to either google or yahoo ;How it knows that it is google or yahoo as both has same port number? Answer will help me alot.
Google and Yaoo have different IP addresses. When you connect to google you use Google_IP +port 80. When you connect to Yahoo you connect to Yahoo_IP + port 80. Does that make sense? rgds steve
The IP is the who and the Port is part of the how.
The IP address of google and yahoo is different. say for google 172.13.73.130 and for yahoo 172.23.73.128 so even accessing the same port the two sockets will be totally different and hence different connections.
using the real world analogy two rooms of two different apartments may have the same room number and hence two server system may have same port number as well.
The port number 80 is the open port of server.here Google server had an open port (80) also Yahoo had an open port (80).
Both Google and Yahoo had different IP addresses.
If I want to connect Google server,I will open a new port,for example I will open port 5000, at the same time I will open another port 5002 to connect with Yahoo server.
My IP + 5000 — connects — Google IP + 80
My IP + 5002 — connects — Yahoo IP + 80
Great work!
Good Job!! Well Explained
Hi! keep up the good work. I have few doubts though, hope you can clear them: 1. Can you tell if a server uses a single port 80 on all of its connections to clients? Or is it used only by the Welcoming socket? Can port 80 handle multiple connections simultaneously?
A port (e.g port 80) can handle multiple connections each connection is a socket and will have a different source IP address and port number.
No… a session needs to be established at said layer. A is lessening on port 443 (SSL) for incoming packets and firewall infront is in addition to alllowing 443 to A also policing 25, 80 etc Whatever….
Excellent explanation. Thankyou!
very good information
The way you explain ed it, now it’s very easy understand the whole thing thanks alot sir .
Complete details about the TCP / IP ports and the sockets. in this article .The infographic is so good that anybody can understand at a glance. I request the author to post more articles on networking.
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Do you ever wonder how the internet works? How from the comfort of your home you can send and receive pictures, emails, calls, and view websites from your device connected to the internet? These actions depend on TCP and UDP ports. How do these ports work, and what are they?
Before delving into the topic, you must understand what a port is. Computers use ports to communicate and form connections with other computers on a network. The port in question here is not a physical component but a virtual endpoint between two or more computers. The most common ports on the internet are the TCP and UDP ports.
TCP stands for Transmission Control Protocol, and it is a connection-oriented protocol. In networking, protocols are rules or standards that govern how data is transmitted between devices. TCP is called a connection-oriented protocol because it establishes a connection between the receiving and sending devices before transmitting any data.
TCP ports are ports that comply with the transmission control protocols. Some TCP ports include File Transfer Protocol ports (20 and 21) for file transfers, the SMTP port (25) and IMAP port (143) for emails, and the Secure Shell port (22).
TCP ports create connections before data is shared. For instance, if you want to tell your friend about a new movie or game, you can make a phone call. You dial your friend's number, and if she gets the call and confirms that you are on the other end of the line, she picks up. Then you can begin to tell her about the game.
That's how TCP ports work, too. A secure connection between the sender and receiving device is ensured before transmitting data. But how do devices using the TCP ports to receive or send data make that connection in the first place? They do this using the three-way handshake.
In TCP, the device sending the data connects to the device supposed to receive it. The way TCP ports establish reliable connections is called a three-way handshake.
As the name implies, a three-way handshake requires three different interactions, which come in the form of three messages: SYN→SYN-ACK→ACK.
The first is the SYN segment. The sending device sends out a SYN (synchronized sequence number) message to try to communicate with the receiving computer. It is trying to say, "Hello! Are you available to make a connection? "
If the receiving device is available to make a connection, it responds to the device sending the connection request with a SYN-ACK segment. The SYN-ACK segment acknowledges the connection request and sends out a synchronized sequence number in return. In plain terms, the device is saying, "Yes, I acknowledge your request, and I am willing to make a connection."
When this happens, the sending device sends an ACK segment to the receiving device, telling it that it has acknowledged its message. Then a connection is formed, and it begins to transfer data. When the data transmission has been confirmed and completed, the connection is ended.
This way, all data sent to the receiving device is complete and sent in the right order. Moreover, there are no missing packets because a connection was made first.
UDP stands for User Datagram Protocol. The User Datagram Protocol is connectionless, which means a host device can transmit data to its recipient without establishing a connection beforehand. UDP ports depend on the UDP/IP protocols. UDP ports include the DNS port (53), the Dynamic Host Configuration Protocol port (68), and the Kerberos port (88), which is used by gaming services.
Unlike the TCP ports, UDP ports do not need to establish connections before transferring data. So, if you wanted to tell your friend about a new movie imitating the up port, you would have to shout out your conversation and hope that your friend is in the vicinity and can hear you. Pretty unreliable, right?
The responsibility of receiving the information you are trying to pass lies solely on your friend. Because you have not made a connection yet, your friend might not hear you properly and only hear bits and pieces or nothing at all.
In UDP ports, the host sends out data in packets (small segments) with no certain destination in mind. Then it hopes that the receiving device gets those packets, which is unreliable as it does not guarantee the data will be received seamlessly. As a result, packets do not get to the receiving end, and data is lost. This is known as packet loss.
Although TCP ports perform the same function of sending information across the internet, they have different features and uses.
A TCP port is more reliable for communication and data transfer because, as a connection-oriented protocol, it establishes a connection with the two devices using a three-way handshake before sending data. This way, all the data is received and in the right order. And when there is an error in the process, it is easy to detect. But, this is not the same with UDP ports.
Because of its reliability, TCP ports are used for services where you need secure and complete data transmission like emails, pictures, websites, etc.
Because UDP ports are connectionless protocols, they save a lot of time by not establishing connections before sending out data packets, which comes in handy for time-sensitive services and where data is received in real-time. UDP ports are used in video, voice, and game streaming.
TCP and UDP ports are networking terms you do not hear regularly, but they are the bedrock of our internet. These two ports play a huge role in your day-to-day life, as without these ports, data transmission would be nigh impossible.
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The ports that are listed in this topic are the addresses and default ports that PAM uses to establish network connectivity to target devices and managed services. capam33. ... Review Port Assignments. The following table lists port assignment requirements for . Privileged Access Manager.
services that run over transport protocols such as TCP, UDP, DCCP, and. SCTP. Service names are assigned on a first-come, first-served process, as. documented in [RFC6335]. Port numbers are assigned in various ways, based on three ranges: System. Ports (0-1023), User Ports (1024-49151), and the Dynamic and/or Private.
This is a list of TCP and UDP port numbers used by protocols for operation of network applications. The Transmission Control Protocol (TCP) and the User Datagram Protocol (UDP) only need one port for duplex, bidirectional traffic.They usually use port numbers that match the services of the corresponding TCP or UDP implementation, if they exist. The Internet Assigned Numbers Authority (IANA) is ...
In computer networking, a port or port number is a number assigned to uniquely identify a connection endpoint and to direct data to a specific service. At the software level, within an operating system, a port is a logical construct that identifies a specific process or a type of network service.A port at the software level is identified for each transport protocol and address combination by ...
The full list of these network port numbers are given in RFC 1700. IANA (Internet Assigned Numbers Authority) assigns these well-known ports. The other network ports are registered ports between 1024 and 49151. These ports are assigned by IANA for specific services. The last part of ports in networking are dynamic ports.
Port 69: TFTP (Trivial File Transfer Protocol) Port 123: NTP (Network Time Protocol) Note that these are just a few examples, and there are many other port numbers that are used for various purposes. For port numbers lookup, the official database of ports and protocols from IANA (Internet Assigned Numbers Authority) is used. IANA is an ...
Find a list of standard network port designations. For a complete list of port assignments, consult the IANA's Port Numbers. If you are using a Unix-like operating system such as macOS or Linux, you can view the services file under the /etc directory by entering at the Unix shell prompt: more /etc/services.
The database is regularly updated to include the latest port assignments and any changes in port usage. Ports Master covers a wide range of port numbers, from well-known ports (0-1023) to registered ports (1024-49151) and dynamic or private ports (49152-65535). ... Network port security is crucial to protect against unauthorized access, data ...
127. Ports 0-1023 are the Well Known Ports and are assigned by IANA. These should only be used for the assigned protocols on public networks. Ports 1024-65535 used to be called Registered Port Numbers (see rfc1700) but are now split into two areas (see rfc6335). Ports 1024-49151 are the User Ports and are the ones to use for your own protocols.
Common Port Assignments Table D-1 lists currently assigned Transmission Control Protocol (TCP) port numbers. To the extent possible, the User Datagram Protocol (UDP) uses the same numbers. Table D-1 Currently Assigned TCP and UDP Port Numbers Port Keyword Description 0— Reserved 1-4 — Unassigned 5 RJE Remote job entry 7ECHO Echo 9 DISCARD ...
TCP and UDP are used to connect two devices over the Internet or other networks. However, to give data packages an entrance to the PC or server at the other end of the connection, the "doors" have to be open. These openings into the system are called ports.For both protocols, there are some known and important ports which you need to know when developing web apps.
This topic lists the well-known port assignments for transport protocols TCP and UDP, and includes port number, keyword, and a description of the reserved port assignment. You can also find a list of these well-known port numbers in the hlq.ETC.SERVICES data set. The official assignment of port numbers is managed by the Internet Assigned ...
TCP (Transmission Control Protocol) ports serve as virtual endpoints for communication sessions between devices connected to a TCP/IP network. Each TCP port is assigned a unique number ranging from 0 to 65535. These ports are categorized into three ranges: well-known ports (0-1023), registered ports (1024-49151), and dynamic or private ports ...
Well-known ports. Well Known Ports (Numbers 0 to 1023) - These numbers are reserved for services and applications. They are commonly used for applications such as HTTP (web server) POP3/SMTP (e-mail server) and Telnet. By defining these well-known ports for server applications, client applications can be programmed to request a connection to that specific port and its associated service.
A crucial domain of expertise in IT-related certifications such as Cisco Certified Network Associate (CCNA) and those of CompTIA is port numbers and associated services, which this common ports and protocols cheat sheet covers. If you want to remember a port number or protocol, this cheat sheet will help everyone, from students to professionals.
The first step is to check the IANA port assignment registries. After that, we can consult unofficial registries and local port mappings and scan the network for ports in use. In conclusion, these are the key steps to selecting a port number for a new network service, ensuring effective communication.
Network Documentation Series: Port Mapping. In this post, I will be doing a brief commentary on creating and maintaining a physical port mapping spreadsheet. A port mapping spreadsheet is useful for keeping track of used/available ports on your network equipment, thoroughly documenting to which remote device each port connects, and generating ...
A port number is a way to identify a specific process to which an internet or other network message is to be forwarded when it arrives at a server. All network-connected devices come equipped with standardized ports that have an assigned number. These numbers are reserved for certain protocols and their associated function.
RFC 7605 Recommendations for Transport Port Use August 2015 There are a few good examples of reasons that more directly suggest that not only is a port number assignment not necessary, but it is directly counter-indicated: o Assigned port numbers are not intended to differentiate performance variations within the same service, e.g., high-speed ...
About TCP/UDP Ports. Port 0 to 1023: These TCP/UDP port numbers are considered as well-known ports. These ports are assigned to specific server sevice by the Internet Assigned Numbers Authority (IANA). For example, port 80 is used by web servers. Port 1024 to 49151: These are ports that an organization, such as application developers, can ...
On a TCP/IP network every device must have an IP address. The IP address identifies the device e.g. computer.. However an IP address alone is not sufficient for running network applications, as a computer can run multiple applications and/or services.. Just as the IP address identifies the computer, The network port identifies the application or service running on the computer.
A port in networking is a virtual checkpoint that directs incoming and outgoing data traffic to the correct program or service on a device. In the most basic sense, a port is a start and endpoint of communication. A port, also known as a network connection, serves as a channel through which different computer devices and applications communicate.
TCP is called a connection-oriented protocol because it establishes a connection between the receiving and sending devices before transmitting any data. TCP ports are ports that comply with the transmission control protocols. Some TCP ports include File Transfer Protocol ports (20 and 21) for file transfers, the SMTP port (25) and IMAP port ...