title: Kibana - socket hang up error
body: <p>I am running Kibana behind IIS reverse proxy server and getting following error</p>
  
  <p><strong>Courier Fetch Error: unhandled courier request error: socket hang up
  I am on Version: 4.2.2, Build: 9177.</strong> 
  I get this error only when I use proxy server which I need to restrict access to Kibana. I am not sure what is causing this or how to fix it.</p>
  
  <pre><code>Error: unhandled courier request error: socket hang up
  at handleError (http://kibana-server/bundles/kibana.bundle.js:70047:23)
  at DocRequest.AbstractReqProvider.AbstractReq.handleFailure (http://kibana-server/bundles/kibana.bundle.js:69967:15)
  at http://kibana-server/bundles/kibana.bundle.js:69861:18
  at Array.forEach (native)
  at http://kibana-server/bundles/kibana.bundle.js:69859:19
  at wrappedErrback (http://kibana-server/bundles/commons.bundle.js:39286:79)
  at http://kibana-server/bundles/commons.bundle.js:39419:77
  at Scope.$eval (http://kibana-server/bundles/commons.bundle.js:40406:29)
  at Scope.$digest (http://kibana-server/bundles/commons.bundle.js:40218:32)
  at Scope.$apply (http://kibana-server/bundles/commons.bundle.js:40510:25)
  </code></pre>