James Tucker
d75f04c927
Re-evaluate authenticated connections on policy updates and at session and forwarding gates. Close connections whose grants are revoked or narrowed, including forwarding permissions, user identity, duration, AcceptEnv, and effective recording requirements. Recheck rule-derived AcceptEnv and recording configuration for delegated connections too. Compare recorder lists with duplicate counts preserved so duplicate entries cannot hide a change of recording destination. Treat recording-failure changes in either direction as material, including fail-open to fail-closed transitions. An inconclusive user lookup retains the previous identity but does not skip other policy checks, including for `"*": "="` mappings. An absent account or a changed username, UID, or primary GID revokes the connection. Preserve explicit getent failures when the os/user fallback cannot find the account, instead of treating every lookup failure as account deletion. Numeric UID mappings use LookupId in the fallback, not Lookup by name. Known limitation: NSS can report a directory-only account as not found (getent exit status 2) during an sssd/LDAP outage. If the fallback also reports the account missing, this is indistinguishable from deletion and still revokes the connection. This availability tradeoff remains accepted for now; explicit command failures, timeouts, and malformed output do not by themselves establish that an account was deleted. Reject forwarding requests using the latched Allow bit before doing a policy recheck. Forwarding gates still re-evaluate policy, but use the latched account identity rather than spawning getent for every forwarded connection (including each SSH -D request). Account identity is rechecked at authentication completion, policy updates, rule expiry, and session gates. Re-arm rule-expiry timers under the policy recheck lock and prevent re-arming after teardown. Add connection-level login grace, extending it during delegation and stopping it only on SSH authentication success, not on unsigned key queries or partial authentication. Close the raw transport and cancel delegated authentication on teardown. Add regression tests for these transitions, wait for the auth-completion recheck before test policy flips, and release stalled recorder handlers even on test failure. Updates tailscale/corp#50380 Signed-off-by: James Tucker <james@tailscale.com>
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.
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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.
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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.