you have to specify the dns servers on the w2k3 machine (under tcp/ip properties). Then to get rid of the router you must install either 2 more nic's on the w2k3 machine or use a switch. However, if you plan to use it as a server/firewall, it must be on all the time for the other 2 pc's to connect to the internet (or at least at the times when you want to connect to the internet).