title: Using fiddler with Windows Authentication
body: <p>I am testing some proxy settings for our application but I need to test a proxy that requires Windows Authentication (or network credentials).</p>
  
  <p>For testing, I assigned the credential of the proxy to the network credentials</p>
  
  <pre><code>System.Net.WebProxy proxy = new System.Net.WebProxy("127.0.0.1", 8888);
  proxy.Credentials = System.Net.CredentialCache.DefaultNetworkCredentials;
  //proxy.Credentials = new System.Net.NetworkCredential("1", "1");
  System.Net.WebRequest.DefaultWebProxy = proxy;
  </code></pre>
  
  <p>Currently, I use Fiddler with the <code>Require Proxy Authentication</code> rule turned on. How can I configure Fiddler so I can use the Windows credentials instead of the default "1" / "1" credentials?</p>