I have a user who's machine is not pingable on our network, using computer hostname or associated IP. However, in troubleshooting this, I see that the IP the machine actually has does not resolve to ...

So I wanted to test out Doom 3 multiplayer, and since my friend and I had just purchased the game, we decided to give it a go a-la direct connect. We both have Linksys routers at home; he has Comcast ...