title: Coturn behind NAT is unreachable in a TURN configuration
body: <p>I'm trying to install a <a href="https://github.com/coturn/coturn" rel="nofollow noreferrer">coturn</a> in a server that is behind a NAT, so I followed the instruction given by <a href="http://doc-kurento.readthedocs.io/en/stable/faq.html" rel="nofollow noreferrer">Kurento's documentation</a> to make it accessible behind the NAT.</p>
  
  <p>The problem is that when I test it with <a href="https://webrtc.github.io/samples/src/content/peerconnection/trickle-ice/" rel="nofollow noreferrer">Trickle ICE</a> I have a "Not reachable?" result (see image below)</p>
  
  <p>Any help whatsoever is greatly appreciated.</p>
  
  <p>Image :
  <a href="https://i.stack.imgur.com/lHOxR.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/lHOxR.png" alt="coturn bug ilustrated with ICE echanges"></a></p>
  
  <p>thank you</p>