d8c7cafedaupdates tailscale/corp#33007 When a selected exit node can't carry internet traffic due to a misconfiguration (wrong ID, node deleted, routes removed, etc), blackhole default routes are installed and all internet traffic is dropped. That is the correct behavior -- better to drop than leak to the local network -- but it was entirely silent: the stable-ID lookup in nodeBackend.updateRouteManagerPrefs misses without a log line, and Status leaves ExitNodeStatus nil. The user sees a healthy Tailscale with no internet. If an admin fat-fingers the exit node name in an IT policy, for example, it's easy to break every node with zero feedback. This adds an exit-node-unavailable health warning covering every way the selection can fail to carry traffic (short of reachability which is a separate concern), reported via exitnodehealth.ArgExitNodeReason. The warning names the exit node, caching its display name while it is still a peer so the name survives its departure, and falls back to the stable ID or IP. When the selection is mandated by the ExitNodeID or ExitNodeIP policy settings, the message tells the user to contact their network administrator instead of suggesting they pick another exit node. To test this, set a forced exit node policy with some random ip or node id. The warning has a 5 second threshold. It should clear as soon as you change to a proper exit node. Signed-off-by: Jonathan Nobels <jonathan@tailscale.com> |
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Tailscale
Private WireGuard® networks made easy
Overview
This repository contains the majority of Tailscale's open source code.
Notably, it includes the tailscaled daemon and
the tailscale CLI tool. The tailscaled daemon runs on Linux, Windows,
macOS, and to varying degrees
on FreeBSD and OpenBSD. The Tailscale iOS and Android apps use this repo's
code, but this repo doesn't contain the mobile GUI code.
Other Tailscale repos of note:
- the Android app is at https://github.com/tailscale/tailscale-android
- the Synology package is at https://github.com/tailscale/tailscale-synology
- the QNAP package is at https://github.com/tailscale/tailscale-qpkg
- the Chocolatey packaging is at https://github.com/tailscale/tailscale-chocolatey
For background on which parts of Tailscale are open source and why, see https://tailscale.com/opensource/.
Using
We serve packages for a variety of distros and platforms at https://pkgs.tailscale.com.
Other clients
The macOS, iOS, and Windows clients use the code in this repository but additionally include small GUI wrappers. The GUI wrappers on non-open source platforms are themselves not open source.
Building
We always require the latest Go release, currently Go 1.27. (While we build releases with our Go fork, its use is not required.)
go install tailscale.com/cmd/tailscale{,d}
If you're packaging Tailscale for distribution, use build_dist.sh
instead, to burn commit IDs and version info into the binaries:
./build_dist.sh tailscale.com/cmd/tailscale
./build_dist.sh tailscale.com/cmd/tailscaled
If your distro has conventions that preclude the use of
build_dist.sh, please do the equivalent of what it does in your
distro's way, so that bug reports contain useful version information.
Bugs
Please file any issues about this code or the hosted service on the issue tracker.
Contributing
PRs welcome! But please file bugs. Commit messages should reference bugs.
We require Developer Certificate of
Origin
Signed-off-by lines in commits.
See commit-messages.md (or skim git log) for our commit message style.
About Us
Tailscale is primarily developed by the people at https://github.com/orgs/tailscale/people. For other contributors, see:
- https://github.com/tailscale/tailscale/graphs/contributors
- https://github.com/tailscale/tailscale-android/graphs/contributors
Legal
WireGuard is a registered trademark of Jason A. Donenfeld.