List of well known ports (computing)
IANA is responsible for assigning port numbers to specific uses. The Well Known Ports are those in the range 0-1023. On Unix-derived operating systems, opening a port in this range to receive incoming connections requires root privileges. Registered port numbers are those in the range 1024-49151. Port numbers in the range 49152-65535 are private or dynamic ports, not used by any defined application.
See the IANA list of port assignments for a full list.
List of network protocols, by port (not exhaustive, please extend and tidy)
- 20/tcp FTP The file transfer protocol - data
- 21/tcp FTP The file transfer protocol - control
- 22/tcp SSH Secure logins, file transfers(scp) and port forwarding
- 23/tcp Telnet non secure text communications
- 25/tcp SMTP Simple Mail Transfer Protocol (E-mail)
- 53/tcp DNS Domain Name Server
- 69/udp TFTP Trivial File Transfer Protocol
- 79/tcp finger Finger
- 80/tcp HTTP HyperText Transfer Protocol (WWW)
- 88/tcp Kerberos Authenticating agent
- 110/tcp POP3 Post Office Protocol (E-mail)
- 113/tcp ident old identification server system
- 119/tcp NNTP used for usenet newsgroups
- 143/tcp IMAP4 Internet Message Access Protocol (E-mail)
- 443/tcp HTTPS used for securely transferring web pages
(entries above 1024 should probably go on a separate page)
- 3306/tcp MySQL Database system
- 6000/tcp X11 used for X-windows
- 6667/tcp IRC, Internet Relay Chat
- 8080/tcp HTTP See Port 80. Often used when running a second web server on the same machine
