Nextcloud Talk app Could not establish a connection A TURN server?

[MichaIng]

@Captain86

Thanks again, this worked with coturn VM and nginx still in place. I just didn’t understand that it could/should work behind nginx.

The proxy is bypassed for Coturn and WebRTC traffic as you forward port 3478 directly. So traffic goes as this:

• Browser Nextcloud access => Nginx => backend webserver => Nextcloud
• Browser Coturn/WebRTC access => Coturn => other video call client browser (Nginx not used at all)
  • The browser gets Coturn access details and authentication token from Nextcloud when you start a video call, but then establishes a completely independent WebRTC connection using a different protocol which is not even understood by Nginx/webservers.