I have to setup a transparent squid proxy server using iptables and squid. Following is the scenario:[INTERNAL NETWORK] -> [Main Switch] -> [Proxy Server] -> [Firewall] -> [EXTERNAL NETWORK]I am having a system with SLES 11 SP3 installed on it and I am supposed to configure it as a router/gateway first, before making any squid configurations.What should be the iptables rules to meet the requirements? 
iptables configuration for Transparent squid proxy
linux;iptables;squid;sles