> I'm trying to forward smtp and pop3 from my router to my mail > server at 10.13.110.1. I've tried both of the following > iptables commands, neither has worked. > > $IPTABLES -t nat -A PREROUTING -i eth1 -p tcp --dport 25 -j > DNAT --to 10.13.110.1 $IPTABLES -t nat -A PREROUTING -i eth1 > -p tcp --dport 110 -j DNAT --to 10.13.110.1 $IPTABLES -A > FORWARD -p tcp -d 10.13.110.1 --dport 25 -j ACCEPT $IPTABLES > -A FORWARD -p tcp -d 10.13.110.1 --dport 110 -j ACCEPT > > > $IPTABLES -t nat -A PREROUTING -d <public_ip> -p tcp --dport > 25 -j DNAT --to 10.13.110.1:25 $IPTABLES -A FORWARD -p tcp > --dport 25 -j ACCEPT $IPTABLES -t nat -A PREROUTING -d > <public_ip> -p tcp --dport 110 -j DNAT --to 10.13.110.1:110 > $IPTABLES -A FORWARD -p tcp --dport 110 -j ACCEPT Do you also have the rule : $IPTABLES -A FORWARD -m state --state RELATED,ESTABLISHED -j ACCEPT It might help. Gr, Rob
