Hi Javier, Try something like this: iptables -t mangle -A POSTROUTING -m nth --every 4 --packet 0 \ -j ROUTE --oif ppp0 iptables -t mangle -A POSTROUTING -m nth --every 4 --packet 1 \ -j ROUTE --oif ppp1 ... iptables -t nat -A POSTROUTING -o ppp0 -j SNAT --to-source <ip-of-ppp0> iptables -t nat -A POSTROUTING -o ppp1 -j SNAT --to-source <ip-of-ppp1> ... Cheers, Chris. -- ___ __ _ / __// / ,__(_)_ | Chris Wilson -- UNIX Firewall Lead Developer | / (_ / ,\/ _/ /_ \ | NetServers.co.uk http://www.netservers.co.uk | \ _//_/_/_//_/___/ | 21 Signet Court, Cambridge, UK. 01223 576516 |