Well, yeah. I entered the game myself and all, but I wasn't sure if that meant other people should be able to do the same. You're saying that if, for instance, my router wasn't set up right, I wouldn't even be able to enter my own game??
I suddenly think aloud and wonder... did I disable my personal firewall? Furthermore, why do I have one when I'm behind my router's firewall? Stuff to ponder...