title: STUN/TURN server connectivity test
body: <p>I am trying to figure out how to test whether a STUN/TURN server is alive and properly responding to connections. Ideally this test would be performed from an external machine, just in case the STUN/TURN machine is down for this case should also be reported by the connectivity test.</p>
  
  <p>Has anyone looked into this case in the past? What solutions would be recommended?</p>