How do I forward TCP from one IP to another?

Question

Here's a thing: I have a piece of software listening on 127.0.0.1:port and only (I can choose the port). I want it to work as a server and accept connections from outer network. How can I forward the communication from (e.g.) 192.168.0.1:port to 127.0.0.1:port?

I am using Ubuntu 11.04. Tried to look into iptables, but they don't actually offer the thing I want to archieve.

Answer 1

You should change the ip address that the software is listening on.

If you bind it to the ip 0.0.0.0 and port 80, then it will be able to listen on all interfaces (127.0.0.1 and 192.168.0.1).

Answer 2

You can easily make a tunnel using SSH.

something like: ssh -L 3307:192.168.0.1:3306 user@127.0.0.1 will tunnel traffic from port 127.0.0.1:3306 to 192.168.0.1:3307

Answer 3

You can do this in your firewall (you should be using one). I use Firestarter and it has an easy interface for forwarding ports.