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Is it feasible to run a TURN server behind NAT? (lemmy.ca)

submitted 7 months ago* (last edited 7 months ago) by hackysphere@lemmy.ca to c/selfhosted@lemmy.world

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I am running a defederated local Matrix server, and I need to set up calls. From what I can tell, the "legacy" calls require a STUN and TURN server, and the new MatrixRTC standard seems to require them as well for Livekit to work. However, I do not want to expose anything out to the public internet, as I want everything to be behind NAT for local access only (all of the clients for the server will also be behind the NATted network). I also have Tailscale running on my servers, and it would be useful if I would be able to connect to the TURN server even when not in the network. Is there a way to get STUN/TURN to work in this situation? It seems that all the servers expect to have public network access.

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[–] undrwater@lemmy.world 5 points 7 months ago

This looks like a really good explanation of how all the pieces work: What Are STUN, TURN, and ICE? | LiveSwitch Server Documentation https://share.google/PV7BKE7Q56vOE9lHl

Based on what you wrote, it looks like you'll need ICE hosts, but no STUN / TURN.