Have you ever managed to compile that thing? I tried to on a vanilla-new instal of VC++ 6.0 and I got all kinds of link errors. Other "sample filters" compiled fine. Origmsg--- Socks 5.0 filter does not ship with ISA server as standard, only Socks 4 filter. There is however, an example of a socks 5.0 filter shipped as an extra with SBS2000 and possibly ISA2000. You will, however, need to compile it using MS Visual C++ Compiler 6.0.