check `/etc/kurento/modules/kurento/WebRtcEndpoint.conf.ini` for non - Google STUN server, we take turn.fairkom.net:
```
stunServerAddress=144.76.116.252
stunServerPort=3478
```
also apply `clientTitle: fairteaching` reduced bitrates, noCheck to `/usr/share/meteor/bundle/programs/server/assets/app/config/settings.yml` see `~/greenlight/config/meteor_app_settings.yml`
also apply `clientTitle: fairteaching` reduced bitrates, noCheck to `/usr/share/meteor/bundle/programs/server/assets/app/config/settings.yml` see `~/greenlight/config/meteor_app_settings.yml`