Hi Daniel, we've developed a Javascript SIP stack which supports WebRTC and we use Debian as base OS and Kamailio as SIP proxy. Some notes about the enviroment in case it could help you:
- Kamailio stable (4.0) version included in official repo works fine.
- I've tested it with QoffeeSIP and JsSIP some days ago and there is no problem.
- I've been playing with "resiprocate-turn-server" package but I had problems. It could be related with our client but we should take a look. I didn't give a try to Google TURN server but I'm going to do it, I'll keep you updated.
PS: I'm co-mentor with you in GSoC, so we can speak about in in IRC channel.