Updated: 09/12/2023 by Computer Hope

A port may refer to any of the following:

PS/2 port

1. With a physical device, a hardware port or peripheral port is a hole or connection found on the front or back of a computer. Ports allow computers to access external devices such as printers. Below is a short listing of the different computer ports you may find on a computer. The picture shows an example of a type of port on the back of a computer.

Computer port examples


You can add more ports to a computer by installing an expansion card. For example, if your desktop computer does not have a FireWire port, you can add an expansion card with a FireWire port.

2. A hardware port or port may also refer to a computer memory I/O port. See our I/O port definition for further information on this term.

3. A port is a term used to describe taking a program written for specific operating systems or platforms and moving it to another. For example, taking a program written for Microsoft Windows and moving it to Linux or an old console game to a computer.

4. With a network or the Internet, a software or network port is where information is sent. For example, port 80 is the HTTP (hypertext transfer protocol) network port. A listing of commonly known and used UDP (user datagram protocol) and TCP (transmission control protocol) ports can also be found below. Users running Microsoft Windows can utilize the netstat command to view currently active connections, including ports currently being used.

Users wanting to block ports on their computer or network can use a software or hardware firewall. If you cannot access a particular port, it's likely that a firewall is already present on the Network or other network settings set by the administrators have been set up.

Port Protocol Description
0 TCP, UDP Reserved (technically illegal to use)
1 TCP, UDP TCP Port Service Multiplexer.
5 TCP, UDP Remote Job Entry.
9 TCP, UDP Discard - RFC 4340 & 4960
12 TCP Dark Ages of Camelot game.
13 TCP, UDP Daytime - RFC 867
14 [reserved] [currently unassigned]
17 TCP, UDP Quote of the day.
18 TCP, UDP Message Send Protocol.
19 TCP, UDP Character Generator (Chargen) - RFC 864
20 TCP, UDP FTP - Data.
21 TCP, UDP FTP - Control.
22 UDP PCAnywhere.
22 TCP, UDP SSH (secure shell) Remote Login Protocol.
23 UDP Dungeon Siege II game.
23 TCP, UDP Telnet
24 TCP, UDP Private e-mail system.
25 TCP, UDP SMTP port for sending e-mail, Final Fantasy XI game.
26 UDP Dungeon Siege II game.
26 UDP Dungeon Siege II game.
27 TCP, UDP NSW User System FE.
30 TCP, UDP Battlefield 1942, Ghost Recon 2, Splinter Cell: Chaos Theory, Splinter Cell: Pandora Tomorrow.
32 [currently unassigned]
33 TCP, UDP Display Support Protocol.
35 TCP, UDP Private print server.
37 TCP, UDP Time - RFC 868
38 TCP, UDP Route Access Protocol
39 UDP Resource Location Protocol
40 TCP Midnight Commander (sometimes).
42 TCP City of Heroes game.
42 TCP, UDP Nameserv (hostname server); WINS (Windows Internet Naming Service).
43 TCP, UDP Whois
48 TCP, UDP Default Audit Daemon.
49 TCP, UDP TACACS (Terminal Access Controller Access Control System) Login Host Protocol.
50 TCP Dark Ages of Camelot game, Vodafone Sure Signal.
50 TCP, UDP Remote Mail Checking Protocol.
51 TCP, UDP IMP Logical Address Maintenance.
52 TCP, UDP XNS (Xerox Network Services) Time Protocol.
53 TCP Socom, Socom 2, Twisted Metal Black Online.
53 UDP Lineage II.
53 TCP, UDP DNS (Domain Name Service)
54 TCP, UDP XNS (Xerox Network Services) clearinghouse.
57 TCP, UDP Private terminal access.
58 TCP, UDP XNS mail.
59 TCP, UDP Private file service.
60 [currently unassigned]
63 TCP, UDP whois++
64 TCP, UDP CI (communications integrator).
65 TCP, UDP TACACS-Database Service.
66 TCP, UDP Oracle SQL*NET.
67 UDP Apple NetBoot.
67 TCP, UDP Bootstrap Protocol Server, DHCP (Dynamic Host Configuration Protocol).
68 UDP Apple NetBoot.
68 TCP, UDP Bootstrap Protocol Client, DHCP
69 TCP, UDP TFTP (trivial file transfer protocol)
70 TCP, UDP Gopher
75 TCP, UDP Private dial-out service.
79 TCP, UDP Finger
80 TCP Age of Empires III, Battlefield 2, Battlefield 2142, Call of Duty: World at War, Command & Conquer Generals/Red Alert 3/Zero Hour, Guild Wars, Lineage II, Need for Speed Carbon/Hot Pursuit 2/Most Wanted, Rainbow Six 3 Raven Shield/Lockdown/Vegas, Worms 4: Mayhem and others.
81 TCP, UDP HOSTS2 Name Server.
82 TCP, UDP XFER Utility.
84 TCP, UDP Common Trace Facility.
87 TCP, UDP Any private terminal link.
88 UDP Xbox Live 360; NCAA 07 Football game.
88 TCP, UDP Kerberos
89 TCP, UDP SU/MIT Telnet Gateway.
90 TCP, UDP DNSIX (DoD Network Security for Information Exchange) security attribute token map.
92 TCP, UDP Network Printing Protocol.
93 TCP, UDP Device Control Protocol.
98 TCP linuxconf.
98 TCP, UDP TAC news.
103 TCP, UDP Genesis Point-to-Point Trans Net; X.400 e-mail.
104 TCP, UDP Digital Imaging and Communications in Medicine (aka DICOM)
107 TCP, UDP Remote Telnet Service.
108 TCP, UDP SNA Gateway Access Server.
109 TCP, UDP POP2 (Post Office Protocol version 2).
110 TCP, UDP POP3 (Post Office Protocol version 3).
113 TCP, UDP IDENT Authentication Service.
115 TCP, UDP SFTP (Simple File Transfer Protocol).
118 TCP, UDP SQL services.
119 TCP, UDP NNTP (Network News Transfer Protocol).
123 UDP NTP (Network Time Protocol).
135 TCP, UDP Blaster worm.
137 TCP, UDP NETBIOS (Network Basic Input/Output System) name service.
138 TCP, UDP NETBIOS datagram service.
139 TCP, UDP NETBIOS session service.
143 TCP, UDP IMAP (Internet Message Access Protocol).
149 TCP, UDP AED 512 emulation service.
152 TCP, UDP BFTP (Background File Transfer Program).
153 TCP, UDP SGMP (Simple Gateway Monitoring Protocol).
156 TCP, UDP SQL service.
158 TCP, UDP PCMail server.
161 TCP, UDP SNMP (Simple Network Management Protocol)
179 TCP, UDP BGP (Border Gateway Protocol)
190 TCP, UDP Gateway Access Control Protocol.
200 TCP, UDP IBM System Resource Controller.
201 TCP, UDP AppleTalk Routing Maintenance.
202 TCP, UDP AppleTalk Name binding.
204 TCP, UDP AppleTalk Echo.
206 TCP, UDP AppleTalk Zone information.
217 TCP, UDP dBase Unix.
219 TCP, UDP Unisys ARP (Address Resolution Protocol).
220 TCP, UDP IMAP (Interactive Mail Access Protocol) v3
256 TCP, UDP RAP (Route Access Protocol).
258 TCP, UDP Yak Winsock Personal Chat.
264 TCP, UDP BGMP (Border Gateway Multicast Protocol).
280 TCP, UDP HTTP-mgmt.
349 TCP, UDP mftp.
363 TCP, UDP RSVP tunnel.
366 TCP, UDP ODMR (On-Demand Mail Relay).
376 TCP, UDP Amiga Envoy Network Inquiry Protocol.
377 TCP, UDP NEC Corporation.
378 TCP, UDP NEC Corporation.
384 TCP, UDP A remote network server system.
385 TCP, UDP IBM application.
387 TCP, UDP AppleTalk Update-Based Routing Protocol.
389 TCP Microsoft NetMeeting 2.0 to 3.01
389 TCP, UDP LDAP (lightweight directory access protocol).
391 TCP, UDP SynOptics SNMP Relay Port.
396 TCP, UDP Novell Netware over IP (Internet Protocol.
397 TCP, UDP MPTN (Multi Protocol Trans. Net).
402 TCP, UDP Genie Protocol.
406 TCP, UDP IMSP (Interactive Mail Support Protocol).
413 TCP, UDP SMSP (Storage Management Services Protocol).
427 TCP, UDP SLP (Service Location Protocol).
433 TCP, UDP NNSP, part of the Network News Transfer Protocol
443 TCP, UDP HTTPS (Hypertext Transfer Protocol over TL/SSL)
443 TCP Quick Assist, Playstation network games, Battlefield 2142, Call of Duty: World at War, Medal of Honor: Rising Sun, Socom, Socom 2
443 UDP Google Talk, and Final Fantasy XI game.
444 TCP, UDP SNPP (Simple Network Paging Protocol).
445 TCP, UDP Microsoft DS.
458 TCP, UDP Apple QuickTime.
464 TCP, UDP Kerberos (set and change password).
465 TCP PlayStation Network, SCEA Game Servers.
465 UDP IGMP (Internet Group Management Protocol) over UDP for SSM.
465 TCP, UDP SMTP protocol over TLS/SSL
511 TCP, UDP PassGo.
514 UDP Syslog
515 TCP, UDP Printer spooler.
519 TCP, UDP Unix time.
520 TCP efs, extended file name server.
520 UDP RIP (Routing Information Protocol).
525 TCP, UDP Time server.
530 TCP, UDP RPC (remote procedure call)
531 TCP, UDP Chat.
533 TCP, UDP Emergency broadcasts.
545 TCP Kerberos encrypted remote shell.
545 TCP, UDP Apple Quick Time Server.
546 TCP, UDP DHCP v6 Client.
547 TCP, UDP DHCP v6 Server.
548 TCP AFP (Apple Filing Protocol) over TCP
554 TCP, UDP RTSP (Real Time Streaming Protocol)
555 TCP Used by trojans and hackers to exploit vulnerabilities.
563 TCP, UDP NNTPS (NNTP protocol over TSL/SSL) and SNEWS.
565 TCP, UDP whoami.
568 TCP, UDP Microsoft shuttle.
569 UDP Delta Force II game.
584 TCP, UDP Key Server.
585 TCP, UDP IMAP4+SSL (de-registered on April 26, 2006)
587 TCP SMTP (simple mail transfer protocol).
587 TCP, UDP Submission - RFC 4409
619 TCP, UDP Compaq EVM, Digital EVM.
636 TCP, UDP LDAPS (Lightweight Directory Access Protocol over TLS/SSL)
666 TCP, UDP Doom Id Software.
687 TCP, UDP asipregistry.
711 TCP, UDP Cisco TDP
799 TCP ControlIT.
800 TCP, UDP Mdbs-daemon
808 TCP Microsoft Net.TCP Port Sharing Service.
902 TCP Self documenting Telnet Door, VMware Server Console, Ideafarm Chat, ISS RealSecure Sensore.
989 TCP, UDP FTP protocol, data, over TLS/SSL
990 TCP, UDP FTP protocol, control, over TLS/SSL
992 TCP, UDP Telnet protocol over TLS/SSL
993 TCP, UDP IMAP 4 protocol over TLS/SSL
994 TCP, UDP IRC (Internet Relay Chat) protocol over TLS/SSL
995 TCP, UDP POP3 protocol over TLS/SSL
1001 UDP Tom Clancy's H.A.W.X. game.
1010 TCP, UDP surf; Mac OS X RPC-based services.
1025 TCP ShopPro accounting software; IIS (Internet Information Server); NFS (network file system).
1025 UDP Windows RPC, network blackjack.
1026 TCP, UDP Calendar Access Protocol.
1027 UDP IPv6 behind NAT44 CPEs.
1080 TCP, UDP Socks Proxy.
1352 TCP, UDP Lotus Notes.
1433 TCP Video Insight IP Video Surveillance Server.
1433 TCP, UDP Microsoft SQL Server
1434 TCP, UDP Microsoft SQL Server database management system monitor.
1477 TCP, UDP Microsoft SNA (Systems Network Architecture) Server.
1484 TCP, UDP Confluent License Manager.
1502 TCP, UDP Shiva.
1688 TCP Key Management Service for Windows Activation
1701 TCP, UDP Layer 2 Tunneling Protocol (L2TP)
1716 UDP America's Army game.
1723 TCP, UDP PPTP (Point-to-Point Tunneling Protocol) and macOS Server VPN (virtual private network) service.
1755 TCP, UDP Microsoft NetShow & Media Server.
1800 TCP, UDP Snom 320 SIP (single in-line package) Phone and ANSYS-License manager.
1812 TCP, UDP RADIUS (Remote Authentication Dial-in User Service).
1855 TCP, UDP Fiorano RtrSvc.
1863 TCP, UDP MSN Messenger
1900 UDP Xbox 360 Media Center.
1900 TCP, UDP SSDP and Universal PnP (plug and play).
1935 TCP, UDP Macromedia Flash Communications Server
RTMP (Real Time Messaging Protocol)
1985 TCP, UDP HSRP (Hot Standby Router Protocol).
1995 TCP, UDP Cisco Perf-port.
1999 TCP, UDP Cisco Identification port.
2000 TCP Remote Anywhere; ICUII; iSpQ VideoChat; Lineage game.
2000 UDP Cisco Identification port.
2000 TCP, UDP Cisco SCCP; Remotely Anywhere.
2077 UDP IRLP (Internet Radio Linking Project).
2077 TCP, UDP Tivoli Storage Manager and TrelliSoft Agent.
2082 UDP IRLP (Internet Radio Linking Project).
2082 TCP, UDP Infowave Mobility Server.
2300 UDP Dungeon Siege game.
2427 UDP Cisco MGCP
2427 TCP, UDP Media Gateway Control Protocol Gateway.
2556 TCP Bagle backdoor virus (W32.Beagle).
2556 TCP, UDP nicetec-nmsvc.
2701 TCP KnowShowGo P2P
2723 TCP KnowShowGo P2P
2723 TCP, UDP WatchDog NT protocol.
2900 UDP Dungeons & Dragons Online and Lord of the Rings Online games.
3000 TCP Mirilax License server, Cloud9 Integrated Development Environment server, Ruby on Rails development default, Meteor development default.
3000 UDP BitTorrent Sync, distributed interactive simulation.
3001 TCP Web100 NDT (network diagnostic tool).
3001 TCP, UDP VidPhone.
3039 TCP, UDP Cogitate, Inc.
3050 TCP, UDP Borland Interbase database (gds_db).
3052 TCP, UDP APC 3052, Powerchute.
3061 TCP, UDP cautcpd.
3074 TCP, UDP XBOX 360
3090 UDP Rainbow Six: Vegas game.
3090 TCP, UDP Senforce Sessions Services (stss); Rappore Session Services (rtss).
3101 TCP BES (BlackBerry Enterprise Server).
3101 UDP Rainbow Six: Vegas game.
3101 TCP, UDP HP (Hewlett-Packard) PolicyXpert PIB Server.
3128 TCP Active API (application programming interface) server port, proxy server port, known Trojan and backdoor port.
3260 TCP iSCSI target.
3268 TCP, UDP Microsoft Global Catalog
3306 TCP Caesar IV game.
3306 TCP, UDP MySQL database server.
3350 UDP Settlers 3 game.
3268 TCP, UDP Microsoft Global Catalog
3269 TCP, UDP Microsoft Global Catalog on SSL (secure sockets layer).
3389 TCP, UDP Remote Desktop and Microsoft Terminal Services.
3525 TCP, UDP EIS Server port.
3783 TCP Gamespy
3784 TCP, UDP Ventrilo and BFD Control Protocol.
4000 TCP Battle.net, Diablo, and Diablo II.
4000 UDP ICQ.
4000 TCP, UDP Command & Conquer: Tiberian Sun and Dune 2000.
4006 TCP, UDP pxc-spvr.
4062 TCP, UDP Ice Location Service on SSL.
4096 TCP, UDP Ascom Timeplex Bridge Relay Element.
4373 TCP, UDP Remote Authenticated Command Service.
4444 TCP, UDP Oracle WebCenter Content.
4444 TCP, UDP Xvfb X server virtual frame buffer service.
4567 TCP Verizon Actiontec Routers firmware monitoring and upgrading by Verizon FiOS(Fiber Optic Service).
4915 [currently unassigned]
4918 [currently unassigned]
4926 [currently unassigned]
5000 TCP DINA DVR Server and Dwyco Video Conferencing.
5000 TCP, UDP Universal Plug-and-Play (UPnP), AIM Video IM (instant message), and Yahoo Messenger Voice Chat.
5037 [currently unassigned]
5060 TCP, UDP Session Initiation Protocol.
5190 TCP America Online, AIM (AOL Instant Messenger), and ICQ.
5190 UDP MSN Messenger.
5191 UDP Neverwinter Nights 2 game.
5191 TCP, UDP AOL (America Online) 1, AOL Instant Messenger, and ICQ.
5192 UDP Neverwinter Nights 2 game.
5192 TCP, UDP AOL 2, AOL Instant Messenger, and ICQ.
5193 UDP Neverwinter Nights 2 game.
5193 TCP, UDP AOL 3, AOL Instant Messenger, and ICQ.
5200 TCP Echolink.
5200 UDP Neverwinter Nights 2 game.
5200 TCP, UDP TARGUS GetData.
5252 UDP Neverwinter Nights 2 game.
5252 TCP, UDP Movaz SSC.
5314 TCP, UDP opalis-rbt-ipc.
5353 UDP iChat, MultiCast DNS (domain name system), and macOS X Bonjour/Zeroconf port.
5424 TCP, UDP Beyond Remote, W32.MyDoom worm
5445 UDP Cisco Unified Video Advantage (not verified)
5445 TCP, UDP Server Message Block over Remote Direct Memory Access (Microsoft).
5500 TCP HotLine Peer-to-Peer (P2P) file sharing, MOHAA (Medal of Honor: Allied Assault), MatchWatch & Reverend, and VNC (Virtual Network Computing)
5500 UDP SecurID.
5631 TCP, UDP PCAnywhere.
5632 TCP MOHAA (Medal of Honor: Allied Assault) Reverend.
5632 UDP PCAnywhere.
5678 TCP MOHAA (Medal of Honor: Allied Assault) Reverend.
5678 UDP iChat.
5678 TCP, UDP Linksys Cable/DSL Routers Remote Administration.
5687 TCP MOHAA (Medal of Honor: Allied Assault) Reverend.
5749 [currently unassigned]
5800 TCP VNC.
5801 TCP VNC.
5900 TCP VNC.
5901 TCP VNC.
6000 UDP Playstation 3, Everquest, Madden NFL 2005, Medal of Honor: Rising Sun.
6000 TCP, UDP X Window
6062 TCP, UDP X Windows System.
6073 UDP Dungeon Siege game.
6084 TCP Peer-to-peer infrastructure protocol.
6112 TCP, UDP Battle.net
6113 TCP, UDP Battle.net.
6114 TCP, UDP Battle.net.
6115 TCP, UDP Battle.net.
6116 TCP, UDP Battle.net.
6117 TCP, UDP Battle.net.
6118 TCP, UDP Battle.net.
6119 TCP, UDP Battle.net.
6500 TCP GameSpy Arcade and Net2Phone registration.
6500 TCP, UDP Games: Black & White, Civilization III, Civilization IV, Star Wars: Battlefront, Star Wars: Empire at War.
6542 TCP irccd.exe service.
6553 [currently unassigned]
6667 TCP Gamespy; IRC, Games: Black & White, Civilization III, Civilization IV, Command & Conquer series, Warhammer 4000: Dawn of War, and Worms 4: Mayhem.
6667 UDP Games: Neverwinter Nights, Rainbow Six 3: Raven Shield.
6667 TCP, UDP MSN Game Zone; Star Wars: Empire at War game.
6801 TCP, UDP Net2Phone; ACNet Control System Protocol.
7000 TCP Games: Command & Conquer series, Dune 2000, Emperor: Battle for Dune, Everquest, Everquest 2
7000 UDP Real Audio, QuickTime 4 server, and PlayStation 3
7070 TCP Real Audio
7070 UDP Games: City of Heroes, City of Villains.
7075 UDP Real Audio, City of Heroes, City of Villains.
7900 TCP, UDP Multicast Event.
8000 TCP WinAmp Audio Streaming; X-Lite; Icecast and Internet radio streams using Shoutcast.
8000 UDP Aliens vs. Predator game.
8000 TCP, UDP iRDMI.
8008 TCP, UDP HTTP alternative.
8080 TCP EvoCam, Pirate Radio, WebcamXP, Unreal Tournament game.
8080 TCP, UDP HTTP alternative.
8081 TCP HTTP alternative and BlackICE ICEcap user console.
8081 TCP, UDP Dreambox 8000
8084 TCP IBM Lotus Sametime server and Apache Tomcat server.
8090 TCP HTTP alternative and WebcamXP
8092 TCP, UDP iTunes Radio Stream, EMC2 (Legato) Networker or Sun Solcitice Backup, QuickTime streaming.
8118 TCP Privoxy.
8443 TCP, UDP PCsync HTTPS, PCSync SSL; SW Soft Plesk Control Panel, Apache Tomcast SSL, and iCal service.
8547 [currently unassigned]
8880 TCP, UDP CDDB (Compact Disc Database) protocol used to transmit audio CD info over the Internet.
9000 UDP Asheron's Call game.
9010 UDP Asheron's Call game.
9011 UDP Asheron's Call game.
9012 UDP Asheron's Call game.
9013 UDP Asheron's Call game.
9090 TCP Zeus admin server.
9090 TCP, UDP WebSM.
9092 TCP, UDP Xml-Ipc Server Reg; Championship Manager 4.
9100 TCP Used to send raw data to a printer.
9339 TCP Clash of Clans, a mobile freemium strategy video game.
9200 TCP Elasticsearch-default Elasticsearch port.
9432 [currently unassigned]
10000 TCP, UDP Network Data Management Protocol.
12345 TCP Port used by Trend Micro antivirus program. Port 12345 is also commonly used by various Trojan viruses, such as Netbus.
12468 TCP VXtreme and WebTheater.
17770 UDP Battlezone 2 game.
17771 TCP, UDP Battlezone 2 game.
17772 UDP Battlezone 2 game.
26000 TCP, UDP Quake, Elite Force, Empire Earth 2, and QuakeWorld primary server.
27015 TCP Half-Life.
27900 TCP Gamespy.
28900 TCP Gamespy.
29900 TCP Gamespy.
29901 TCP Gamespy.
31337 TCP Back orifice
33334 UDP Empire Earth game.
33335 TCP Empire Earth game.
47624 TCP Age of Empires, Baldur's Gate, Close Combat.

Controller, Externet Port, Firewall, Input/output port, Interface, I/O port, Operating system terms, Port bar, Port forwarding, Port scanner, Port triggering, Uplink