d837e0252f
When an Exit Node is used, we create a WFP rule to block all inbound and outbound traffic, along with several rules to permit specific types of traffic. Notably, we allow all inbound and outbound traffic to and from LocalRoutes specified in wgengine/router.Config. The list of allowed routes always includes routes for internal interfaces, such as loopback and virtual Hyper-V/WSL2 interfaces, and may also include LAN routes if the "Allow local network access" option is enabled. However, these permitting rules do not allow link-local multicast on the corresponding interfaces. This results in broken mDNS/LLMNR, and potentially other similar issues, whenever an exit node is used. In this PR, we update (*wf.Firewall).UpdatePermittedRoutes() to create rules allowing outbound and inbound link-local multicast traffic to and from the permitted IP ranges, partially resolving the mDNS/LLMNR and *.local name resolution issue. Since Windows does not attempt to send mDNS/LLMNR queries if a catch-all NRPT rule is present, it is still necessary to disable the creation of that rule using the disable-local-dns-override-via-nrpt nodeAttr. Updates #13571 Signed-off-by: Nick Khyl <nickk@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 1.23. (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 git log for our commit message style. It's basically the same as
Go's 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.