What is Port?

  1. When referring to a computer or device, a hardware port resembles a plug-in or connection commonly found on the back of a computer. Hardware ports allow computers to have access to external devices such as computer printers. Below is a short listing of the different computer ports you may find on a computer.
    AT Port (Old Keyboard Port)
    Firewire port
    LPT Port (Printer Port)
    PS/2 Port (Keyboard Port and Mouse Port)
    Serial Port
    Sound in and Line in
    Sound out and Line out
    USB Port
  2. Term used to describe the process of taking a program that has been written for specific operating systems and moving it to another operating system. For example, taking a program written for Microsoft Windows and moving it to Linux.
  3. When referring to a network or to the Internet, a software or network port is a location where information is sent through. A commonly used and accessed port is port 80, which is the http port. A listing of commonly known and used ports can also be found on the below listing. Users running Microsoft Windows can utilize the netstat command to view currently active connections that include ports currently being used.Users who wish to block ports on their computer or network can use a software or hardware firewall. If you are unable to get access to 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 setup.
Port Protocol Description
0 Reserved
1 TCP TCP Port Service Multiplexer
5 Remote Job Entry
7 TCP, UDP ECHO
9 TCP, UDP Discard
13 TCP, UDP Daytime – RFC 867
17 TCP, UDP Quote of the Day
18 TCP, UDP Message Send Protocol
19 TCP Chargen – RFC 864
20 TCP FTP – Data
21 TCP FTP – Control
22 TCP SSH Remote Login Protocol
22 UDP PCAnywhere
23 TCP Telnet
24 Private e-mail system
25 SMTP
27 TCP ETRN
33 Display Support Protocol
35 Private print server
37 TCP, UDP Time – RFC 868
38 TCP, UDP Route Access Protocol
39 UDP Resource Location Protocol
42 Nameserv (Host Name Server)
43 Whois
47 NI FTP
48 Default Audit Daemon
49 Login
50 Remote Mail Checking Protocol
52 XNS Time Protocol
53 DNS
57 Private terminal access
58 XNS mail
59 Private file service
60 NI mail
63 whois++
65 TACACS-Database Service
66 Oracle SQL*NET
67 Bootstrap Protocol Server, DHCP
68 Bootstrap Protocol Client, DHCP
69 TFTP
70 Gopher
75 Private dial out service
79 Finger
80 HTTP
80 TCP Dungeon Siege game
81 HOSTS2 Name Server
82 XFER Utility
87 Any private terminal link
88 Kerberos, XBOX 360
89 SU/MIT Telnet Gateway
92 Network Printing Protocol
93 Device control Protocol
95 SUPDUP
98 TAC news
103 X400
106 3COM-TSMUX
107 Remote Telnet Service
108 SNA Gateway Access Server
109 POP2 (Post Office Protocol version 2)
110 POP3 (Post Office Protocol version 3)
115 Simple File Transfer Protocol
118 SQL Services
119 NNTP
130 CISCO FNATIVE
131 CISCO TNATIVE
132 CISCO SYSMAINT
135 Blaster worm
137 NETBIOS Name Service
138 NETBIOS Datagram Service
139 NETBIOS Session Service
143 IMAP
150 SQL-NET
151 HEMS
152 Background File Transfer Program
153 SGMP
154 NETSC
156 SQL Service
158 PCMail Server
161 SNMP
168 RSVD
179 Border Gateway Protocol
190 Gateway Access Control Protocol
200 AppleTalk Routing Maintenance
202 AppleTalk Name binding
204 AppleTalk Echo
206 AppleTalk Zone information
213 IPX
217 dBase Unix
219 Unisys ARP
220 Interactive Mail Access Protocol v3
256
258 Yak Winsock Personal Chat
263 HDAP
264 BGMP
280 HTTP-mgmt
315 DPSI
321 PIP
349 mftp
363 RSVP tunnel
366 ODMR
377 NEC Corporation
378 NEC Corporation
384 A Remote Network Server System
385 IBM Application
387 AppleTalk Update-Based Routing Protocol
391 SynOptics SNMP Relay Port
396 Novell Netware over IP
397 Multi Protocol Trans. Net.
402 Genie Protocol
406 Interactive Mail Support Protocol
413 SMSP
420 SMPTE
430 UTMPSD
431 UTMPSD
443 HTTPS
444 SNMP
445 Microsoft DS
458 Apple Quick Time
511 PassGo
514 Syslog
515 Spooler
519 Unix time
525 Time server
530 rpc
531 Chat
533 Emergency broadcasts
545 Apple Quick Time Server
546 DHCP Client
547 DHCP Server
563 SNEWS
565 whoami
568 Microsoft shuttle
569 MSN
585 IMAP4+SSL
666 Doom Id Software
711 Cisco TDP
799 ControlIT
989 FTP protocol, data, over TLS/SSL
990 FTP protocol, control, over TLS/SSL
992 Telnet protocol over TLS/SSL
993 IMAP4 protocol over TLS/SSL
994 IRC protocol over TLS/SSL
995 POP3 protocol over TLS/SSL
1025
1026
1080 Socks
1477 Microsoft SNA Server
1502 Shiva
1701 L2TP
1716 America’s Army
1755 Microsoft NetShow
1812 RADIUS
2300 UDP Dungeon Siege game
3074 TCP, UDP XBOX 360
3389 Remote Desktop
3783 TCP Gamespy
4000 ICQ
4000 TCP, UDP Battle.net, Diablo, and Diablo II.
5190 AOL (AOL Instant Messenger – AIM)
5191 AOL 1
5192 AOL 2
5193 AOL 3
5631 PCAnywhere
5632 PCAnywhere
5800 TCP VNC
5801 TCP VNC
5900 TCP VNC
5901 TCP VNC
6073 UDP Dungeon Siege game
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 Net2Phone Registration
6667 IRC
6667 TCP Gamespy
6801 Net2Phone
7000 VDOLive
7070 Real Audio
7075 Real Audio
8008 HTTP alternative
8080 HTTP alternative
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
12345 Port used by Trend Micro antivirus program.
Port 12345 is also commonly used by variousTrojans such as Netbus.
12468 VXtreme
17770 UDP Battlezone 2 game
17771 TCP,UDP Battlezone 2 game
17772 UDP Battlezone 2 game
26000 Quake game
27015 TCP Half-Life
27900 TCP Gamespy
28900 TCP Gamespy
29900 TCP Gamespy
29901 TCP Gamespy
33334 UDP Empire Earth game
33335 TCP Empire Earth game
43188 ReachOut
47624 TCP Age of Empires game, Baldur’s Gate game, and Close Combat g
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