Here is a link to
D-Link's FAQ on how to open your gnutella port on their line of broadband routers.
They didn't mention to the user how they can even find out their local IP address. In Windows 98, that can be done by clicking Start, then Run, then typing "winipcfg" and then selecting the proper network adapter from the dropdown list that is connected to the broadband router and your local IP address will show there and that is the private IP you would put in their instructions.