need iptable help forwarding ip.

[ulao]

I have a eth0 ( outside ip ) and a eth0:1 ( lan ip/192.168.0.x ) I want to take all 8080 traffic from out side and direct it to 192.168.0.21:8080

I tried

iptables -t nat -A PREROUTING -p tcp -i eth0 --dport 8080 -j DNAT --to 192.168.0.21:8080

and figured I may need

iptables -A FORWARD -p tcp -i eth0 -d 192.168.0.21 --dport 8080 -j ACCEPT

but its not working. What did I do wrong? Do I need to do anything with apache2 as it shows the default it works page on 8080.

[ulao]

Well I made it work on 3000 like so.

iptables -t nat -A PREROUTING -i eth0 -p tcp -m tcp --dport 3000 -j DNAT --to-destination 192.168.0.21:8080
iptables  -A INPUT -i eth1 -p tcp -m tcp --dport 3000 -j ACCEPT

[Lazydog]

Now look at the 2 setups and see what is different between them. Then make sure what ever program you have listening on 808 is also listening on the 8080 on the ip address you want to redirect to.