How NAT traversal works
https://tailscale.com/blog/how-nat-traversal-works/ [tailscale.com]
2021-01-11 23:30
We covered a lot of ground in our post about How Tailscale Works. However, we glossed over how we can get through NATs (Network Address Translators) and connect your devices directly to each other, no matter what’s standing between them. Let’s talk about that now!
Very detailed.