How to setup my router usr 9000 for hosting game

Archived from groups: comp.security.firewalls (More info?)

Hi to all,
i just buy a new router for my home network, the usr 9000. I connect
this router to my switch for my home network and work well.
Now i want make a setup for this router to Host a game network in
internet. I have the list of the port needed for this game but the
problem that i can see my server computer, with an internal IP,
outside my network.
I just want that if i have the ip 192.168.1.4 in my netwwork for the
server computer of my game, and the router have pubblic IP
80.100.100.100, every call to this ip is automaticaly traslate into
192.168.1.4.

How can i setup this router for this work?

Many thanks at all, Carruba74