title: IIS Express Enable External Request - 503
body: <p>I have attempted to get IIS Express working so that external users can view my MVC ASP.NET development website.  I followed instructions on this <a href="https://stackoverflow.com/questions/3313616/iis-express-enable-external-request">SO answer</a> but am now getting a 503 error when accessing the website using my external IP address, localhost still works fine.</p>
  
  <p>My configuration file seems ok</p>
  
  <pre><code>&lt;site name="ManagerUI" id="5"&gt;
      &lt;application path="/" applicationPool="Clr4IntegratedAppPool"&gt;
          &lt;virtualDirectory path="/" physicalPath="D:\Application Development\Manager\MAIN-Branch\ManagerUI\ManagerUI" /&gt;
      &lt;/application&gt;
      &lt;bindings&gt;
          &lt;binding protocol="http" bindingInformation="*:1904:" /&gt;
      &lt;/bindings&gt;
  &lt;/site&gt;
  </code></pre>
  
  <p>I found the following <a href="https://stackoverflow.com/a/5452471/94278">SO answer</a> which solves the issue, but it will ONLY allow it to work on an external address rather than all my IP addresses (localhost, external one etc)</p>
  
  <pre><code>&lt;binding protocol="http" bindingInformation=":1904:your-machine-name" /&gt;
  </code></pre>