I want to be able to leave my laptop in my apartment on crappy weather days so that I'm not risking carrying my PowerBook on my bike to campus. I have an always on internet connection from my apartment. I know how I would do it normally do it, but I am using an Airport Express base station and so my laptop's individual IP address is not the same as my external IP address (obvious as it's 10.0.1.3, and confirmed with www.ipchicken.com). Since I have played network games and the like at the apartment I know that it's possible for other computers to see mine. There must be a way to connect then. How do I set this up?