We recently started seeing users of both webRTC and SIP, and different browsers, able to connect but they get no audio or video back. Our best guess is that this involves incomplete support for IPv6 on our end, because the same clients can connect to one of our other clouds.
We haven't yet found how our IPv6 config differs from what confluence says it should be.
Check if the network of the clients is providing them with both IPv4 and IPv6. Only networks that do not provide IPv6 to clients work with all our clouds.
Is anyone else having issues with WebRTC and the latest release of FireFox? We are showing one way media - with media flowing properly TO the browser, but no media coming back from the browser.