[atlasduo]

This has been going on for a while. A year or so ago I remember Tailscale was blocking downloads of their applications from Russian IPs. HTTP 451 means "unavailable for legal reasons" so I imagine this is Tailscale trying to cover its soft spots.

[chupasaurus]

They deployed the 451 during the last 2 days of August 2023 [1][2].

[1] https://github.com/tailscale/tailscale/issues/9158

[2] https://www.reddit.com/r/Tailscale/comments/1672n6k/

[dipierro]

DERP and login/control servers reply with 451 since yesterday. Previously, only pkgs were affected.