I noticed that #tailscale establishes P2P connections even through NAT, so I was curious how it worked. Very interesting read. Especially when it doesn't work in a straightforward way:

https://tailscale.com/blog/how-nat-traversal-works

How NAT traversal works

Learn how NAT traversal works, how Tailscale can get through and securely connect your devices directly to each other.

@can Very interesting read indeed. Thanks for sharing!