Ummm... and what has that got to do with the difference between a leaf & an ultrapeer? Pease don't tack a question onto the end of a totally unrelated thread, it's a big pain.

Use the forum search to look for port forwarding. You'll find hundreds of threads.
This site is a good place to start. It will explain port forwarding & has a huge list of routers/modems with detailed instructions.
http://www.portforward.com/