According to them, not necessarily [0]. They do have relay servers (they call them DERPs) [1] but they're only used in rare situations where UDP is blocked enti

According to them, not necessarily [0]. They do have relay servers (they call them DERPs) [1] but they're only used in rare situations where UDP is blocked entirely. I admit I wasn't able to understand most of those explanations so I could be wrong. :) [0] https://tailscale.com/blog/how-nat-traversal-works/ https://tailscale.com/blog/how-nat-traversal-works/ [1] https://tailscale.com/blog/how-tailscale-works/#encrypted-relays-derp https://tailscale.com/blog/how-tailscale-works/#encrypted-re... under "Encrypted TCP relays (DERP)"