Commonly-used network ports

This is a list of network ports commonly used by applications that provide network services, like file sharing or remote desktop viewing. You can change your system’s firewall to block or allow access to these applications. There are thousands of ports in use, so this table isn’t complete.

Port	Name	Description
5353/udp	mDNS, Avahi	Allows systems to find each other, and describe which services they offer, without you having to specify the details manually.
631/udp	Printing	Allows you to send print jobs to a printer over the network.
631/tcp	Printing	Allows you to share your printer with other people over the network.
5298/tcp	Presence	Allows you to advertise your instant messaging status to other people on the network, such as “online” or “busy”.
5900/tcp	Remote desktop	Allows you to share your desktop so other people can view it or provide remote assistance.
3689/tcp	Music sharing (DAAP)	Allows you to share your music library with others on your network.

You can choose the displayed language by adding a language suffix to the web address so it ends with e.g. .html.en or .html.de.
If the web address has no language suffix, the preferred language specified in your web browser's settings is used. For your convenience:
[ Change to English Language | Change to Browser's Preferred Language ]

The material in this document is available under a free license, see Legal for details.
For information on contributing see the Ubuntu Documentation Team wiki page. To report errors in this documentation, file a bug.

Ubuntu Documentation

Commonly-used network ports

More Information

See Also