Is it possible to open network ports on a public wi-fi router? I'm at a hotel with free wi-fi trying to connect my Xbox 360 via the Microsoft wireless router. It worked great for a few days, then it just quit. When I test the connection it says I need to open up some port (connects to the internet, just not Live). Is it possible to do this through OS X somehow? It's an unsecured network. I was going to try this, should that do it? (I'm at work now) Any help would be appreciated!