Use Tailscale's techniques for NAT Traversal

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According to How Tailscale works and How NAT traversal works by Tailscale, they apparently have some advanced and open source methods for punching through NATs without UPnP and NAT-PMP including people stuck behind CG-NAT.

What do you think about the possibility of using those techniques to increase the number of clients able to get direct connections instead of relying on relaying?

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We’re already using holepunching to establish TCP/UDP connections, if possible. The only real difference is that Tailscale is pulling a few more tricks to deal with Endpoint-Dependent NATs.

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