chaosinthecrd 3d62394afc ipn/ipnlocal: add TS_SERVE_ALLOW_ALL_INTERFACES to opt serve out of the tun bind
On Linux, serve's kernel listeners are now bound to the tunnel interface, which
stops LAN-adjacent hosts completing a handshake with the listener (see #21420).
That bind drops packets that arrive on another interface addressed to the node's
Tailscale IP, which breaks the Kubernetes operator's
`tailscale.com/experimental-forward-cluster-traffic-via-ingress` ingress feature.

Add `TS_SERVE_ALLOW_ALL_INTERFACES`, which makes serve's listener skip the
interface bind so those packets are answered again. It applies only to serve
listeners, not the web client listener, which shares the same code but stays
bound. It only affects serve; the peerapi listener stays bound too. This is a
targeted opt-out for the operator to set on the affected proxies. Enabling it
re-exposes the serve listener to the local network.

Updates tailscale/corp#48248

Signed-off-by: chaosinthecrd <tom@tmlabs.co.uk>
2026-09-25 16:35:59 +01:00
2026-09-16 10:08:11 -04:00
2026-09-23 18:02:11 -07:00
2026-07-10 17:39:16 -07:00
2026-01-27 16:15:17 -08:00
2026-06-02 10:59:29 -07:00
2026-08-28 12:47:04 -07:00
2026-09-17 16:55:23 -07:00

Tailscale

https://tailscale.com

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:

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:

WireGuard is a registered trademark of Jason A. Donenfeld.

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