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! Let’s start with a simple problem: establishing a peer-to-peer connection between two machines. In Tailscale’s case, we want to set up a WireGuard® tunnel, but that doesn’t really matter. The techniques we use are widely applicable and...