SOCKS
SOCKS is a generic application proxy that provides limited access control. So long as the client software is SOCKS-aware, applications can use it. SOCKS v4 only supported TCP, SOCKS v5 supports UDP and ICMP. As far as FireWall-1 is concerned, communications to a SOCKS proxy server always happen on TCP port 1080 (this is configurable) and does not do any filtering of SOCKS traffic beyond what it sees in the TCP headers (i.e. a connection from a client machine to a SOCKS server on port 1080). Communications from a SOCKS proxy server look like normal traffic coming from a client machine, which FireWall-1 can filter. FireWall-1 itself does not contain a SOCKS proxy, nor are there any plans to implement a SOCKS proxy in the future. You can find out more info on SOCKS from
http://www.socks.nec.com -- GuyR - 18 Jan 2004
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