I actually read your question with my eyes this time ;o) and now see that you want to do it with SSH port forwarding. Yes SSH can do port forwarding but how will you differentiate between which destination port you want to send to? How will you say that "this traffic needs to go to port 80 on my machine" or "this traffic needs to go to port 4160"? You can get ssh to bind and forward other ports on your master node, so then port 81 would forward through to port 80 on the internal network and port 4161 would forward to port 4160, but only within your SSH session.
You can use SSH to run up a quick and dirty VPN, or setup a proper VPN aswell. Lots of stuff. Tell us more about the nature of the connections on the inside.