Well, by looking at your other post I'm guessing you have a Linksys BEFSX41. Here is the step by step guide for port forwarding (Don't mind the port triggering part, that is somethings else. Now for the information your talking about, I'm guessing its for the Static Ip Address. You are going to need the ip address, the subnet mask, the default gateway, and the DNS servers. Hope I could help.