From what I understand, VS2012 comes with the IIS Express version by default. And it allows you to connect to the development site using IP address. Currently I can connect using `http://localhost:22222`. But this would not connect using this `http://xxx.xxx.xxx.xxx:22222` where xxx just a local IP of the development machine . I have verified that the IIS Express is running and being used. The IE error was http 400 bad request.