title: How can I block all mobile phones from accessing my website
body: <p>I'm in the process of building an ASP.Net/C# site on IIS 7.5 and I would like to block all mobile phones from accessing this website.  </p>
  
  <p>How can I block/deny access to this website (which uses Windows Authentication) from all types of mobile phones?  I'm building an internal application that I want only desktops with IE to access.  This is more of a security need than anything.   </p>
  
  <p>Ideally I would like to check to see if the user is accessing this website via mobile phone (or just approved browsers) first before any Windows challenge/response happens.    </p>
  
  <p>I've been looking to Google for pointers (with no luck) on this as well as looking at URL Rewrite options.  Since I'm relatively new to this aspect of Web Programming I'm at a bit of a loss on where to begin looking or if I'm even looking in the right places.  I'm not sure if I should just allow one approved browser through or block all mobile phones.</p>