title: How to add the client ip in request header in fiddler
body: <p>I am using fiddler as a reverse proxy, I want to forward the client ip in the request header so that the server can get it like this:</p>
  
  <pre><code>oSession.oRequest["X-Forwarded-For"]=;
  </code></pre>
  
  <p>But I don't know the variable name that I should set, can anyone help me with this? Thanks a lot.</p>