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Nick Khyl d837e0252f wf/firewall: allow link-local multicast for permitted local routes when the killswitch is on on Windows 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>		3 weeks ago
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.github	.github: Bump github/codeql-action from 3.26.8 to 3.26.9 (#13625 )	3 weeks ago
appc	appc: track metrics for route info storing	3 months ago
atomicfile	…
chirp	…
client	client/web: use tsaddr helpers	4 weeks ago
clientupdate	…
cmd	cmd/tailscale/cli: make 'tailscale debug ts2021' try twice	3 weeks ago
control	control/control{client,http}: don't noise dial localhost:443 in http-only tests	3 weeks ago
derp	derp: document the RunWatchConnectionLoop callback gotchas	4 weeks ago
disco	…
docs	docs/windows/policy: add ADMX policy setting to configure the AuthKey	3 weeks ago
doctor	…
drive	drive/driveimpl: use su instead of sudo	2 months ago
envknob	kube,cmd/{k8s-operator,containerboot},envknob,ipn/store/kubestore,*/depaware.txt: rename packages (#13418 )	2 months ago
gokrazy	gokrazy, various: use point versions of Go and update Nix deps	1 month ago
health	control/controlhttp: fix connectivity on Alaska Air wifi	3 weeks ago
hostinfo	hostinfo: add hostinfo.IsNATLabGuestVM	3 months ago
internal	…
ipn	ipn/ipnlocal: add advertised and primary route metrics	4 weeks ago
jsondb	…
k8s-operator	cmd/k8s-operator,k8s-operator: add ProxyGroup CRD (#13591 )	4 weeks ago
kube	cmd/containerboot,kube,util/linuxfw: configure kube egress proxies to route to 1+ tailnet targets (#13531 )	4 weeks ago
licenses	licenses: update license notices	1 month ago
log	…
logpolicy	logpolicy: don't create a filch buffer if logging is disabled	3 weeks ago
logtail	…
metrics	metrics: revert changes to MultiLabelMap's String method	4 weeks ago
net	net/dns: tweak DoH timeout, limit MaxConnsPerHost, require TLS 1.3 (#13564 )	3 weeks ago
omit	…
packages/deb	…
paths	…
portlist	…
posture	control/controlclient,posture,util/syspolicy: use predefined syspolicy keys instead of string literals	2 months ago
prober	prober: make status page more clear	3 months ago
proxymap	ipnlocal,proxymap,wgengine/netstack: add optional WhoIs/proxymap debug	1 month ago
release	{release,version}: add DSM7.2 specific synology builds (#13405 )	4 weeks ago
safesocket	all: fix new lint warnings from bumping staticcheck	2 months ago
safeweb	safeweb: add a ListenAndServe method to the Server type (#13498 )	1 month ago
scripts	…
sessionrecording	sessionrecording,ssh/tailssh,k8s-operator: log connected recorder address (#13382 )	2 months ago
smallzstd	…
ssh/tailssh	ssh: Add logic to set accepted environment variables in SSH session (#13559 )	3 weeks ago
syncs	…
tailcfg	tailcfg: add AcceptEnv field to SSHRule (#13523 )	1 month ago
taildrop	…
tempfork	…
tka	tka: truncate long rotation signature chains	2 months ago
tool	tool/gocross: make gocross-wrapper.sh keep multiple Go toolchains around	4 weeks ago
tsconst	cmd/tailscale/cli: support passing network lock keys via files	2 months ago
tsd	util/usermetrics: make usermetrics non-global	4 weeks ago
tsnet	ipn/ipnlocal: add advertised and primary route metrics	4 weeks ago
tstest	wf/firewall: allow link-local multicast for permitted local routes when the killswitch is on on Windows	3 weeks ago
tstime	…
tsweb	usermetric: add initial user-facing metrics	2 months ago
types	cli: add `tailscale dns query` (#13368 )	4 weeks ago
util	cmd/containerboot,kube,util/linuxfw: configure kube egress proxies to route to 1+ tailnet targets (#13531 )	4 weeks ago
version	{release,version}: add DSM7.2 specific synology builds (#13405 )	4 weeks ago
wf	wf/firewall: allow link-local multicast for permitted local routes when the killswitch is on on Windows	3 weeks ago
wgengine	cmd/containerboot,kube,util/linuxfw: configure kube egress proxies to route to 1+ tailnet targets (#13531 )	4 weeks ago
words	words: raccoon dog, dog with the raccoon in 'im	3 months ago
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.gitignore	tstest/tailmac: add customized macOS virtualization tooling (#13146 )	2 months ago
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ALPINE.txt	…
AUTHORS	…
CODEOWNERS	…
CODE_OF_CONDUCT.md	…
Dockerfile	all: switch to and require Go 1.23	2 months ago
Dockerfile.base	…
LICENSE	…
Makefile	ssh/tailssh: fix SSH on busybox systems	2 months ago
PATENTS	…
README.md	all: switch to and require Go 1.23	2 months ago
SECURITY.md	…
VERSION.txt	VERSION.txt: this is v1.75.0 (#13454 )	1 month ago
api.md	{api.md,publicapi}: remove old API docs (#13468 )	1 month ago
build_dist.sh	…
build_docker.sh	build_docker.sh: update script comment (#12970 )	3 months ago
flake.lock	nix: update nix and use go 1.23	2 months ago
flake.nix	gokrazy, various: use point versions of Go and update Nix deps	1 month ago
go.mod	go.mod: upgrade golangci-lint	4 weeks ago
go.mod.sri	go.mod.sri: update SRI hash for go.mod changes	2 months ago
go.sum	go.mod: upgrade golangci-lint	4 weeks ago
go.toolchain.branch	all: switch to and require Go 1.23	2 months ago
go.toolchain.rev	go.toolchain.rev: bump oss, test toolchain matches go.toolchain.rev	1 month ago
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header.txt	…
pkgdoc_test.go	…
pull-toolchain.sh	…
shell.nix	go.mod.sri: update SRI hash for go.mod changes	2 months ago
staticcheck.conf	…
update-flake.sh	…
version-embed.go	…
version_tailscale_test.go	go.toolchain.rev: bump oss, test toolchain matches go.toolchain.rev	1 month ago
version_test.go	…

README.md

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:

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:

Legal

WireGuard is a registered trademark of Jason A. Donenfeld.