I tried to use Jitsi (on Firefox 64bit, Windows 10) behind a proxy, which supports ports 80 and 443. I can use text chat with other users but cannot get audio or video to work.
When I opened the additional port TCP 4443 on the Firewall, audio and video still did not work (not even if I fully bypass the proxy and have all connections directly via the firewall).
Finally I temporarily opened port UDP 10000 on the firewall and then audio and video worked perfectly.
But I cannot permanently open port UDP on the firewall. As far as I understood the documentation audio and video should fall back to port TCP 4443 and even fall back to TCP443 (if both UDP 10000 and TCP 4443 fail).
So, is there a way to get audio and video running behind a proxy (with ports 80 and 443 only)?
Is there a way to use audio and video without opening an UDP port (opening another TCP port would be acceptable)?
Any help is appreciated!