okey gurus... I need help with iptable, and I'm a bit noob on this area..

This is the problem: I have a debian box as a router in my home,
the kernel version is 2.6.8-1-686 and I got all necessary modules loaded.

The real problem is that my working-computer is, yes windows XP my job is graphics and animations, on the network with the IP 10.0.0.100 and I need port 3389 and 21 to that PC.. I have no clue whatsoever how I'm going to manage this and that's why I'm asking you gurus..

ip to router: 10.0.0.1
ip to me: 10.0.0.100

needed ips: 3389, 21

please help, I need this quick :s , thanks,


André.

To forward ports from the linux router to the windows machine add the following:

iptables -t nat -A PREROUTING -i eth0 -p tcp --dport 21 -j DNAT --to-destination 10.0.0.100
iptables -t nat -A PREROUTING -i eth0 -p tcp --dport 3389 -j DNAT --to-destination 10.0.0.100

iptables -A FORWARD -i eth0 -o eth1 -p tcp --dport 21 -j ACCEPT
iptables -A FORWARD -i eth0 -o eth1 -p tcp --dport 3389 -j ACCEPT
iptables -A FORWARD -i eth1-o eth0 -j ACCEPT

For the above rules I've used eth0 as the external interface on the linux router and eth1 as the internal interface conneting to the LAN. Verify those are correct before add the rules. Also enable paket forwarding with: echo "1" > /proc/sys/net/ipv4/ip_forward

If port forwarding wasn't what you're trying to do, then explain in more detail what you'd like to accomplish

It worked perfectly thanks caveman