On: Wiretrustee: WireGuard-Based Mesh Network

[generalizations]

I wonder if the work they put in can be extracted to some kind of tool the other projects can use as well. NAT traversal always seems like the limiting factor in projects like this.

[littlestymaar → generalizations]

NAT traversal is an impossible problem in practice in the general case (boo symmetric NATs), and the best-effort version is a solved problem since at least 2003 with the STUN protocol[1] which is part of WebRTC, and there are STUN implementations available in many languages[2].

[1]: https://datatracker.ietf.org/doc/html/rfc3489 [2]: For instance, Rust: https://github.com/webrtc-rs/stun & Go:https://github.com/pion/stun, and see this HN comment listing a few WebRTC implementations (which include STUN): https://news.ycombinator.com/item?id=26739253

[Intermernet → generalizations]

Sorry, I meant to add this to my original comment. Link to pertinent blog entry: https://tailscale.com/blog/how-nat-traversal-works/