If I replace in my iptables script : iptables -A POSTROUTING -t nat -o eth2 -j SNAT --to my_public_IP by iptables -t nat POSTROUTING -o eth1 -j MASQUERADE ...I can access to the internet faster ! Have you got any idea ? My ipatbles script is present in one of my mail (Firewall IP change title) Thanks, Fred