title: Does the Azure Application Gateway support websockets
body: <p>I've setup an azure application gateway with two backend machines. The gateway has cookie affinity enabled and sockjs is used.</p>
  
  <p>The browser initiates a websocket connection for which it receives an '101 Switching Protocols' response. However there is no communication over the websockets and sockjs falls back to long polling.</p>
  
  <p>Does the azure application gateway support websockets? Is some configuration required to enable websockets?</p>