Hi guys, i was trying to implement a redirection of my smtp trafic using netfilter an iproute with packet marking, just like is explained in lartc documentation... I will try to explain my configuration bellow: ther are two computers with fedora 2, kernek 2.6.9, iproute2-ss020116 and iptables v1.2.1. Computers names are pc1 and pc2, the network is 192.168.192.0... the pc1 is the one in charge to redirect the traffic to pc2, so for that my configuration is the following one: This configuration is for PC1 with ip 192.168.192.1 First i will mark the packets ( smtp ) iptables -A PREROUTING -t mangle -p tcp --dport 25 -j MARK --set-mark 1 then i will make a rule for that mark aiming at the smtp, smtp is declared in rt_tables ip rule add fwmark 1 table smtp and finally a default route for smtp table ip route add default via 192.168.192.2 table smtp ip ro flush cache So that is what i do, but for some reason is not working, i use iptraf in order to check where the packets are going, but it seems that they stops in PC1, an they are not routed to PC2. Anyone have an idea ? thanks