title: Load balancer or IIS - which one is causing my urls to be case sensitive
body: <p>We have two Windows 2008 R2 serveres set up with a Cisco Ace-30 load balancer, and a few MVC and WebForms apps (.net 4.5 and 4.5.1) with federated authentication (thinktecture). The load balancer is configured with ssl, but the traffic from load balancer to web servers is on http. The problem I'm trying to solve is that the part of the url is case sensitive. Take this urls:</p>
  
  <ul>
  <li><a href="https://my-server.temp.net/MyApp/" rel="nofollow">https://my-server.temp.net/MyApp/</a> (working)</li>
  <li><a href="https://my-SERVER.temp.net/MyApp/" rel="nofollow">https://my-SERVER.temp.net/MyApp/</a> (working)</li>
  <li><a href="https://my-SERVER.temp.net/MyApp/DEfault.AsPX" rel="nofollow">https://my-SERVER.temp.net/MyApp/DEfault.AsPX</a> (working)</li>
  <li><a href="https://my-server.temp.net/myapp/" rel="nofollow">https://my-server.temp.net/myapp/</a> (not-working, that is no response)</li>
  </ul>
  
  <p>In the load balancer, I've disabled the default case sensitivity, and from what I've read there's no such setting in IIS. I've tried creating a static website (no auth) and this works as expected:</p>
  
  <ul>
  <li><a href="https://my-server.temp.net/StaticSITE/" rel="nofollow">https://my-server.temp.net/StaticSITE/</a> (working)</li>
  <li><a href="https://my-server.temp.net/staticsite/" rel="nofollow">https://my-server.temp.net/staticsite/</a> (working)</li>
  </ul>
  
  <p>I've also tried setting up a url rewrite rule, and once that rule is applied the the timeout appear. My guess is that it is IIS that rewrites the incomming http request to a new http request, and the load balancer does not recognize its the https request that has been modified. But I'm guessing and beyond my comfort zone here.</p>
  
  <p>So now I'm a bit confused and unsure what's causing the url to be case sensitive. Is it:</p>
  
  <ul>
  <li>The load balancer</li>
  <li>IIS</li>
  <li>The authentication</li>
  <li>Something else</li>
  </ul>
  
  <p>I would be really happy for any ideas or debugging tips</p>
  
  <p>Thanks</p>
  
  <p>Larsi</p>