Don't you have to setup your linux host as a firewall? I've not gotten round to trying much of this myself yet, but my understanding was that you needed: 1) squid, to give your WinPC's a www proxy. 2) /etc/mail/relay-domains to allow sendmail to relay mail 3) ipchains in your kernel (?) 3) socks (sp?) for passing other protocols like ftp, telnet, etc. (I've a suspicion you might not need socks if you have ipchains .. not sure on that though. Someone more experienced will be able to tell you). There must be a HOWTO on setting all this up I guess. I've not needed to do it myself yet (though I will in the near future) so I'm just repeating things I've noticed in other posts from time to time. Hope that gives you a nudge in the right direction. John