title: How Orvibo S20 WIFI plugs are controlled outside of local network?
body: <p>I bought a Orvibo S20 WIFI plug. It works great when controlled within local network. Some information on the control protocole are available here (<a href="https://stackoverflow.com/questions/22897831/wifi-socket-communication-with-android-phone/28649187#28649187">Wifi socket communication with android phone</a> ).
  But outside of local network (from cellular or Internet), the plug control does not work.
  Does someone has information on how these plugs are controlled outside of local network? Which protocole, ports are used, when do plugs update dynDNS servers...?
  Thanks for help</p>