List of well-known ports (computing)

IANA is responsible for assigning Transmission Control Protocol and User Datagram Protocol Port (computing) 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 (computing), or alternatively be by a commonly used program that didn t get an IANA registered port or port range.

ICANN formed a [http://www.icann.org/general/iana-contract-21mar01.htm contract with the US government] on March 21, 2001, and now performs the IANA s function.

The tables below indicate a status of Official if the application-port combination is in the [http://www.iana.org/assignments/port-numbers IANA list of port assignments] , and a status of Unofficial otherwise. A status of Conflict is also indicated if the port being unofficially used is also officially registered for another application/protocol.

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= Ports 0 to 1023 =

= Ports 1024 to 49151 =

= Ports 49152 to 65535 =

By definition, no ports can be officially registered in the Dynamic Ports range.

= External links =

*[http://www.iana.org/assignments/port-numbers Official IANA list] (also linked above) *[http://www.akerman.ca/port-table.html List of selected/nonstandard TCP/IP ports and related information] *[http://www.windowsnetworking.com/articles_tutorials/tcpipprt.html TCP/IP advanced: Ports] *[http://ports.tantalo.net ports.tantalo.net] *[http://www.seifried.org/security/ports/ Kurt Seifried s ports list, 0-65535] *[http://www.iss.net/security_center/advice/Exploits/Ports/ iss.net Port Knowledgebase] *[http://www.gameconfig.co.uk GameConfig] TCP and UDP port settings for games *[http://www.freebsd.org/cgi/cvsweb.cgi/~checkout~/src/etc/servicesrev=1.62.2.17 FreeBSD etc/services file]