I think I figured it out.

I think I figured out how to set this up. I just opened this to see if anyone has tried it.

Ok so, I'm setting two ips onto my ubuntu machine

192.168.1.161 (A static IP that's outside of my routers control)

The router forwards (pretty much) all ports to 161 when it's requested via external (no-ip).

Then I have a second ip being 192.168.0.50 where this IP is in the settings of my (actually beasties) files. So the way this will work is that someone requests and it's forwarded to 192.168.1.161 and then it bounces off to a new ip on the network which would be 192.168.0.50. I'm searching how to make a Virtual IP and such and I'll add to this as I progress.