i m running redhat linux enterprize edition and i configured squid and internet was running on client's PC. but when i was going to configure the transparents squid then it causes problem and now internet is not running on client's PC. i also want to know, what i did wronge that causes that now internet is not running. now i want to tell my scenario i have two PCs one on which squid server is running and second is the client's PC. i ve two thernet cards eth0 (internet provider connection) and eth1( attacjhed to the client's PC). To make the squid server as transparent i run this command iptables-t nat -A PREROUTING -i eth0 -p tcp --dport 80 -j REDIRECT --to-port 3128 .iptables-t nat -A PREROUTING -i eth1 -p tcp --dport 80 -j REDIRECT --to-port 3128 unfortunately i run above command on both interfaces and now internet is not running. what is wronge in that.