Let me explain.
Port forwarding is almost always done at a router level.
I can log into my router (at 192.168.0.1 from my own network) and change the settings so ports * though * are directly open to my computer. All routers are different but for whatever your doing theres prolly a guide and theres usually a generic guide too.
I was trying to get on to my internet yesterday and it refused to work, and one of my problems could have been from my router cuz i could still logon to it. it was having trouble after i had to quit out of the SuSE 10.0 installer early(I was reinstalling after ruining X again
) and internet was setup wrong. I eventually rebooted back into setup, finished and found that it didnt work... internet wasnt working. So i worked on it for two days and yesterday, being the working guy i am i stopped. I did get somewhere, i found out it was working but couldn't resolve hostnames because it was trying to do it in the loopback device... So what did i do to fix it? Well, i had a copy of visual boy advanced for windows with link support... So, me my brother and a couple friends tried to vba link and play Kirby.... It was actually more fun than i thought. Well, anyways i found my probs in the hostname section of YaST, not my router. But it very well could have been. Just make sure to have some friends on the same network and vba link handy if you cant get the internet working but you can get networking working
So google on a guide for your router. Youll find one, i hope.