title: Run multiple sites from one IP in IIS
body: <p>I have a box with Windows Server 2008 and IIS 7, and I'm using an ASP.NET app. 
  I am trying to run multiple sites from one IP, but I can't access the sites from the outside. I can only access the Default website from outside but when I want to access the second one it does not work. </p>
  
  <p>The second one should run on the <code>http://ip:81</code> and the default one is on 80.
  They both run fine locally on the box and I have added a rule on the firewall to allow all inbound.</p>