I wonder if you can give me an advice about our network topology. We have a checkpoint firewall, MS Exchange and Proxy servers, Esafe virus scan server, a server which DNS, DHCP and WINS services are on, and a Websense server. I want all clients to reach the Internet through proxy and I want to do the URL filtering by Websense. But whomever I talk to suggests a different topology. Some said that proxy should stay at LAN whereas some said it should be at DMZ with Websense. What would be the optimum topology?