List of well-known ports (computing) Details, Meaning List of well-known ports (computing) Article and Explanation Guide

List of well-known ports (computing) Guide, Meaning , Facts, Information and Description

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.

IANA does not enforce this; it is simply a set of recommended uses. Sometimes ports may be used for different applications or protocols than their official IANA designation. This misuse may, for example, be by a Trojan horse. Or it may be a common program that you use every day, but that never got an IANA registered port or port range.

See the IANA list of port assignments for a full list.

Table of contents

1 0 to 1023
2 1024 to 49151
3 49152 to 65535
4 Unregistered Ports
5 External links

0 to 1023

20/tcp FTP The file transfer protocol - data
21/tcp FTP The file transfer protocol - control
22/tcp SSH Secure logins, file transfers (scp, sftp) 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
53/udp DNS
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
445/tcp Microsoft-DS (Active Directory, Windows shares, Sasser-worm)
445/udp Microsoft-DS
591/tcp FileMaker 6.0 Web Sharing (HTTP Alternate, see port 80)

1024 to 49151

1080/tcp SOCKS Proxy
3128/tcp HTTP used by web caches and the default port for the Squid cache
3306/tcp MySQL Database system
5190/tcp AOL and AOL Instant Messenger
6000/tcp X11 used for X-windows
6667/tcp IRC, Internet Relay Chat
8000/tcp iRDMI. Often mistakenly used instead of port 8080.
8080/tcp HTTP Alternate (http-alt) or WWW caching service (web cache). Often used when running a second web server on the same machine, for proxy and caching server, or for running a Web server as a non-root user. See also Port 80. Tomcat also uses this as its default port.

49152 to 65535

Unregistered Ports

These are ports that may be in common use, but that are not formally registered with IANA. Where the use conflicts with a registered use, the notation CONFLICT is used.

1337/tcp WASTE Encrypted File Sharing Program
5000/tcp Universal Plug & Play; Windows network device interoperability (CONFLICT with registered use: commplex-main)
5432/tcp Postgres Database system
5800/tcp VNC remote desktop protocol (for use over HTTP)
5900/tcp VNC remote desktop protocol (regular port)
31337/tcp Back Orifice Remote administration tool (often Trojan horse)

External links

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