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I have a client who I'm pretty sure is behind a double NAT. No WebRTC things work for them (tried Jitsi Meet and GoToMeeting) and I suspect their network setup. Is there any good way to debug this situation or to work around it so they can use WebRTC?

(Reason for double NAT is: ISP-level NAT + probably in-home NAT. Client is remote so I cannot directly verify their hardware setup.)

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2 Answers 2

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The simplest approach to working around trouble networks is to use a TURN server. This allows the client to make a TCP connection to the TURN server, which works around most NAT issues. With media connections over TCP, there are real-time performance issues, but this gets a basic service working.

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Even UDP might work if the NAT's doesn't explicitly blocks UDP.
You just need to have a good NAT aware WebRTC server to handle this situation.

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