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Last modified: Sunday, December 14, 1997 

A protocol for handling TCP traffic through a proxy server. It can be used with virtually any TCP application, including Web browsers and FTP clients. It provides a simple firewall because it checks incoming and outgoing packets and hides the IP addresses of client applications.

There are two main versions of SOCKS -- V4 and V5. V5 adds an authentication mechanism for additional security. There are many freeware implementations of both versions. One of the most common V5 implementations is SOCKS5, developed by NEC.

SOCKS was recently accepted as an IETF standard and is documented in RFC 1928, 1929 and 1961.

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For pages about SOCKS . Also check out the following links!

Related Links

Introduction to SOCKS
Provides a good overview of SOCKS, including some helpful diagrams.

Detailed and up-to-date FAQ on SOCKS. Maintained by several engineers at NEC.

SOCKS home page
Home page for the unofficial SOCKS web site hosted by NEC.

SOCKS Resources
Index of Web pages and sites related to SOCKS. The page is maintained by Aventail Corporation, a leading provider of VPN solutions.

Answers questions about NEC's implementation of the SOCK V5 protocol.

related categories

Internet Protocols


related terms

proxy server


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