title: IIS Passing client certificate to rails
body: <p>I have an application written in Rails that must be ran behind a IIS server due to restrictions by the client, the government.  We have to have SSL authentication.  So what I can't figure out in my hours of searching Google is how to get IIS to pass the client certificate to the rails server (thin).</p>
  
  <p>I've seen tutorials on Apache that use:</p>
  
  <pre><code>SSLOptions +ExportCertData
  </code></pre>
  
  <p>Which then make it available to the request object.  Any ideas on how to configure IIS to do the same?</p>