Posted by xd1936 2 days ago
https://tailscale.com/blog/how-tailscale-works
Ah! OK, now I get it! :-)
But, what found particularly interesting on that page was the following:
>" Some especially cruel networks block UDP entirely
, or are otherwise so strict that they simply cannot be traversed using STUN and ICE. For those situations, Tailscale provides a network of so-called DERP (Designated Encrypted Relay for Packets) servers. These fill the same role as TURN servers in the ICE standard, except they use HTTPS streams and WireGuard keys instead of the obsolete TURN recommendations."
DERP seems like one interesting solution (there may be others!) to UDP blockages...
Short lived tokens is not always an option
It can get especially interesting when you do things like have your GitHub runners onboard themselves to Tailscale - at that point you can pretty much fully-provision isolated systems directly from GitHub Actions if you want