SOCKS is an Internet protocol that allows both TCP and UDP communications via a proxy server.


SOCKS is a de facto standard for circuit-level gateways.

Another use of SOCKS is as a circumvention tool, allowing traffic to bypass Internet filtering to access content otherwise blocked, e.g., by governments, workplaces, schools, and country-specific web services.

Some SSH suites, such as OpenSSH, support dynamic port forwarding that allows the user to create a local SOCKS proxy. This can free the user from the limitations of connecting only to a predefined remote port and server.

The Tor onion proxy software presents a SOCKS interface to its clients.

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