Can't get port forwarding to work on Ubuntu
- by Znarkus
I'm using my home server as NAT/router, which works well. But now I'm trying to forward port 3478, which I can't get to work.
eth0 = public interface
eth1 = private network
$ cat /proc/sys/net/ipv4/conf/eth0/forwarding
1
$ cat /proc/sys/net/ipv4/conf/eth1/forwarding
1
Then to forward port 3478 to 10.0.0.7, I read somewhere that I should run
iptables -t nat -A PREROUTING -p tcp -i eth0 --dport 3478 -j DNAT --to-destination 10.0.0.7:3478
iptables -A FORWARD -p tcp -d 10.0.0.7 --dport 3478 -m state --state NEW,ESTABLISHED,RELATED -j ACCEPT
I also ran
ufw allow 3478
But testing port 3478 with http://www.canyouseeme.org/ doesn't work. Any idea what I have done wrong?
