Can you telnet to port 25, and does it connect you to your private host? If so, you have an SMTP issue. On Mon, 2003-07-14 at 13:43, Brei, Matt wrote: > Iâm trying to forward smtp and pop3 from my router to my mail server > at 10.13.110.1. Iâve 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 > > > > The later works great for ftp and http forwards. Why wonât it work > for 25 and 110? > > > > eth0= 10.13.110.1 > > eth2= <public_ip> > > > > Matt Brei > > > >
