i already made my SLES 9 server as a router for my LAN, so all my windows pc will go through it to access the net.

internet--->adsl modem--->router--->eth0--->sles 9 server<---eth1--->win pcs

i want to block access to porno sites as all my users are kids. how do i do that with my current setting?

or do i have to install squid? afaik squid is a proxy server. how do i use it in my environment?

thanks.

i would suggest using squid with dansguardian to provide a decent content filtering solution. You have the issue of how to force all non server web requests to use the proxy, so you would either use iptables on the router to transparently redirect and port 80 requests passing through into the proxy or just block those port 80 requests outright, forcing all clients to manually connect to the proxy.

you don't actually *Need* suid here, dans runs as a parent proxy to squid normally, not a plugin or anything, so you can just use dans as a pure filter and not benefit from the squid caching.