The easiest, most secure way to use WireGuard and 2FA.
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configure DNS even when router.Set fails (#20488)
* wgengine: configure DNS even when router.Set fails

Reconfig configured the router first and returned on any router.Set error,
before the DNS block ran. On a host where router config fails on every
reconfig -- e.g. a tun MTU below 1280 that breaks IPv6, or a kernel missing
netfilter features -- the OS resolver was never told about MagicDNS or the
tailnet search domain, so tailnet names failed to resolve with no DNS error
in the logs.

Record the router error and continue instead of returning on it, still
attempt dns.Set, and join the router, DNS, and VPN-reconfigure errors into
the return value. DNS stays after router config (still needed: some DNS
managers refuse to apply settings before the device has an address); only
the error coupling is broken. Fixes a regression from 84430cdfa (v1.8.0).

Updates #20447

Signed-off-by: Brendan Creane <bcreane@gmail.com>

* wgengine/router/osrouter: gate IPv6 on per-interface support, not just global

getV6Available reported IPv6 usable whenever the netfilter runner reported
global IPv6 support, missing the case where the kernel has IPv6 but has not
enabled it on tailscale0 specifically -- e.g. when the tun MTU is below the
1280-byte IPv6 minimum, so /proc/sys/net/ipv6/conf/tailscale0 never exists
and the v6 address and route adds fail, aborting the whole Set. See #20447.

AND a per-interface check into getV6Available, evaluated per call so a later
Set picks up v6 if the interface gains it. All v6-gated operations funnel
through getV6Available, so Set now skips v6 gracefully instead of erroring.
Also remove the dead r.v6Available field that masked this with its global
name.

Updates #20447

Signed-off-by: Brendan Creane <bcreane@gmail.com>

---------

Signed-off-by: Brendan Creane <bcreane@gmail.com>
2026-07-16 14:53:30 -07:00
.bencher bencher: add config to suppress failures on benchmark regressions. 2021-10-01 16:16:02 -07:00
.github .github: double the timeout for go vet in CI 2026-07-16 16:05:04 +01:00
appc appc,feature/conn25: use custom scheme resolvers for conn25 2026-05-29 12:23:47 -07:00
atomicfile all: remove AUTHORS file and references to it 2026-01-23 15:49:45 -08:00
chirp all: remove AUTHORS file and references to it 2026-01-23 15:49:45 -08:00
client all: apply go fix 2026-07-10 17:39:16 -07:00
clientupdate cmd/tailscale: add 'configure pve-appliance' to make Proxmox VM of appliance 2026-07-07 13:12:13 -07:00
cmd Update tailscale/gliderssh to pull in tailscale/gliderssh#12 (#20485) 2026-07-16 13:46:23 -06:00
control ipn/ipnlocal,wgengine: move disco-key change detection to nodeBackend 2026-07-14 06:32:35 -07:00
derp derp/derpserver,cmd/derper: use slices.Clip for cert chain copies (#20484) 2026-07-15 22:13:27 -04:00
disco disco: remove experimental label from BindUDPRelayHandshakeState 2026-03-24 11:04:11 -07:00
docs docs: add CLI evolution guidelines 2026-07-10 14:55:33 -07:00
doctor all: remove AUTHORS file and references to it 2026-01-23 15:49:45 -08:00
drive all: apply go fix 2026-07-10 17:39:16 -07:00
envknob envknob/logknob: remove unused package (#19515) 2026-04-24 15:48:06 -07:00
feature feature/conn25,types/appctype: serve active Conn25 state over localapi 2026-07-16 16:35:38 -04:00
gokrazy gokrazy, tstest, cmd/vnet: switch amd64 kernel to gokrazy/kernel.amd64 2026-07-15 11:45:02 -04:00
health all: don't repeat the the word "the" unnecessarily 2026-06-18 16:32:08 +01:00
hostinfo clientupdate, cmd/tailscale: verify signed GAFs, wire up tailscale update for Gokrazy 2026-06-30 07:09:25 -07:00
internal .github,.policy-tests.yml: test .policy.yml in CI 2026-06-26 15:55:15 -07:00
ipn ipn/ipnlocal,cmd/tailscale/cli: support unix socket targets for TCP serve 2026-07-16 09:13:38 -06:00
jsondb all: remove AUTHORS file and references to it 2026-01-23 15:49:45 -08:00
k8s-operator all: apply go fix 2026-07-10 17:39:16 -07:00
kube cmd/{k8s-operator,containerboot,kube}: support IPv6 in egress ProxyGroup (#19898) 2026-07-14 13:26:40 +01:00
licenses licenses: update license notices 2026-07-08 11:14:50 -07:00
log cmd/tailscale/cli: fix time in tailscale routecheck (#19956) 2026-06-01 16:12:08 -07:00
logpolicy logpolicy,tsnet: remove syspolicy dependency 2026-06-05 16:21:27 -05:00
logtail all: don't repeat the the word "the" unnecessarily 2026-06-18 16:32:08 +01:00
metrics cmd/vet/lowerell, drive/driveimpl: forbid variables named "l" or "I" 2026-05-04 14:03:28 -07:00
misc all: apply go fix 2026-07-10 17:39:16 -07:00
net ipn/ipnlocal, wgengine/wgcfg/nmcfg: stop building peer lists on delta path 2026-07-15 11:21:36 -04:00
omit all: remove AUTHORS file and references to it 2026-01-23 15:49:45 -08:00
packages/deb all: remove AUTHORS file and references to it 2026-01-23 15:49:45 -08:00
paths all: remove AUTHORS file and references to it 2026-01-23 15:49:45 -08:00
portlist all: apply go fix 2026-07-10 17:39:16 -07:00
posture posture: add HealthTracker for serial number retrieval (#19181) 2026-04-25 15:42:47 -03:00
prober prober: deflake TestHTTPBandwidth 2026-06-23 08:35:57 -07:00
proxymap all: remove AUTHORS file and references to it 2026-01-23 15:49:45 -08:00
release release/dist/synology: add GOARM=7,softfloat mode for hi3535 2026-05-27 10:54:15 -07:00
safesocket all: apply go fix 2026-07-10 17:39:16 -07:00
safeweb all: don't repeat the the word "the" unnecessarily 2026-06-18 16:32:08 +01:00
scripts scripts/installer.sh: update KDE Linux link (#19857) 2026-05-24 21:40:42 +01:00
sessionrecording sessionrecording: close idle connections after upload 2026-06-19 13:42:14 +01:00
ssh/tailssh ssh/tailssh: dissallow purely numeric usernames for SSH 2026-06-11 17:52:51 -06:00
syncs cmd/vet: add subtestnames analyzer; fix all existing violations 2026-04-05 15:52:51 -07:00
tailcfg all: apply go fix 2026-07-10 17:39:16 -07:00
tempfork misc/genreadme,tempfork/pkgdoc,tsnet: generate README.md files from godoc 2026-04-22 15:13:09 -07:00
tka tka: use a named constant to tidy up sig_test.go 2026-06-11 10:37:48 +01:00
tool all: fix more typos caused by unnecessary repetition 2026-07-06 10:36:17 +01:00
tsconsensus all: migrate code off Notify.NetMap to Notify.SelfChange 2026-05-01 06:51:40 -07:00
tsconst ipn/ipnlocal, cmd/tailscale/cli: auto-renew TLS certs and warn while pending 2026-06-01 16:31:54 -07:00
tsd ipn/ipnlocal,tsd: add NoiseRoundTripper to tsd.Sys 2026-05-13 14:56:28 -07:00
tsnet ipn/ipnlocal, wgengine/wgcfg/nmcfg: stop building peer lists on delta path 2026-07-15 11:21:36 -04:00
tstest .github, tstest/natlab/vmtest: replace old VM runner job with natlab tests 2026-07-15 15:25:14 -04:00
tstime cmd/tailscale/cli: fix time in tailscale routecheck (#19956) 2026-06-01 16:12:08 -07:00
tsweb all: apply go fix 2026-07-10 17:39:16 -07:00
types feature/conn25,types/appctype: serve active Conn25 state over localapi 2026-07-16 16:35:38 -04:00
util wgengine/wgcfg,wgengine,ipn/ipnlocal: remove Peers from wgcfg.Config 2026-07-14 19:57:59 -04:00
version all: fix more typos caused by unnecessary repetition 2026-07-06 10:36:17 +01:00
wf wf: allow limited broadcast to/from permitted interfaces when using an exit node on Windows 2026-01-23 18:30:38 -06:00
wgengine configure DNS even when router.Set fails (#20488) 2026-07-16 14:53:30 -07:00
wif wif: add AWS ecs for autogenerated OIDC tokens 2026-03-25 14:41:41 -06:00
words words: add "cat" to scales.txt (#20106) 2026-06-12 12:48:53 +01:00
.gitattributes .gitattributes: explicitly mark text files as such with eol 2026-06-23 13:04:07 -07:00
.gitignore cmd/fbstatus: add framebuffer status display for the Tailscale appliance 2026-07-02 09:24:01 -07:00
.golangci.yml .golangci.yml: enforce gliderssh import alias via importas linter 2026-04-07 11:59:38 +01:00
.policy-tests.yml .github,.policy-tests.yml: test .policy.yml in CI 2026-06-26 15:55:15 -07:00
.policy.yml .policy.yml: tweak policy after testing 2026-06-26 12:28:02 -07:00
.stignore Add .stignore for syncthing (#18540) 2026-01-27 16:15:17 -08:00
ALPINE.txt docker: bump alpine v3.19 -> 3.22 (#17155) 2025-09-17 20:22:24 +01:00
api.md {api.md,publicapi}: remove old API docs (#13468) 2024-09-13 14:10:33 -06:00
assert_ts_toolchain_match.go .: permit running binary built with TS_GO_NEXT=1 2026-02-23 09:37:04 -08:00
build_dist.sh Add --strip option to build_dist 2026-06-02 10:59:29 -07:00
build_docker.sh docker: add riscv64 to container image architectures 2026-03-29 07:47:39 -07:00
cache_key_test.go util/cibuild, cache_key_test: skip TestTsgoRevInCacheKey outside Tailscale CI 2026-05-14 15:55:05 -07:00
CODE_OF_CONDUCT.md CODE_OF_CONDUCT.md: update code of conduct 2025-10-28 08:58:00 -07:00
CODEOWNERS CODEOWNERS,.policy.yml: replace CODEOWNERS with a policy-bot policy 2026-06-26 10:30:59 -07:00
Dockerfile go.toolchain.branch: switch to Go 1.26 2026-03-04 21:57:05 -08:00
Dockerfile.base all: remove AUTHORS file and references to it 2026-01-23 15:49:45 -08:00
flake.lock nix: update flakes to get a nixpkgs version with go 1.26 2026-03-06 04:06:57 -08:00
flake.nix Update tailscale/gliderssh to pull in tailscale/gliderssh#12 (#20485) 2026-07-16 13:46:23 -06:00
flakehashes.json Update tailscale/gliderssh to pull in tailscale/gliderssh#12 (#20485) 2026-07-16 13:46:23 -06:00
go.mod Update tailscale/gliderssh to pull in tailscale/gliderssh#12 (#20485) 2026-07-16 13:46:23 -06:00
go.sum Update tailscale/gliderssh to pull in tailscale/gliderssh#12 (#20485) 2026-07-16 13:46:23 -06:00
go.toolchain.branch go.toolchain.branch: switch to Go 1.26 2026-03-04 21:57:05 -08:00
go.toolchain.next.branch tool/gocross, pull-toolchain.sh: support a "next" Go toolchain 2026-01-27 14:07:35 -08:00
go.toolchain.next.rev go.mod: bump Go to 1.26.5 2026-07-08 17:15:35 -07:00
go.toolchain.rev go.mod: bump Go to 1.26.5 2026-07-08 17:15:35 -07:00
go.toolchain.version go.mod: bump Go to 1.26.5 2026-07-08 17:15:35 -07:00
gomod_test.go all: remove AUTHORS file and references to it 2026-01-23 15:49:45 -08:00
header.txt all: remove AUTHORS file and references to it 2026-01-23 15:49:45 -08:00
LICENSE all: remove AUTHORS file and references to it 2026-01-23 15:49:45 -08:00
license_test.go all: remove AUTHORS file and references to it 2026-01-23 15:49:45 -08:00
Makefile gokrazy, Makefile: improve appliance build tooling 2026-07-02 09:24:01 -07:00
PATENTS Move Linux client & common packages into a public repo. 2020-02-09 09:32:57 -08:00
pkgdoc_test.go cmd/vet/lowerell, drive/driveimpl: forbid variables named "l" or "I" 2026-05-04 14:03:28 -07:00
pull-toolchain.sh tool/updateflakes, cmd/nardump: replace update-flake.sh with Go tool 2026-04-28 10:18:32 -07:00
README.md README: update the version of Go in the README (#19168) 2026-03-28 22:21:41 -03:00
SECURITY.md Add a SECURITY.md for vulnerability reports. 2020-02-11 10:26:41 -08:00
shell.nix Update tailscale/gliderssh to pull in tailscale/gliderssh#12 (#20485) 2026-07-16 13:46:23 -06:00
staticcheck.conf all: cleanup unused code, part 2 (#10670) 2023-12-21 17:40:03 -08:00
version_tailscale_test.go all: remove AUTHORS file and references to it 2026-01-23 15:49:45 -08:00
version_test.go all: remove AUTHORS file and references to it 2026-01-23 15:49:45 -08:00
version-embed.go cmd/printdep: add --next flag to use rc Go build hash instead 2026-01-27 14:49:56 -08:00
VERSION.txt VERSION.txt: this is v1.101.0 (#19992) 2026-06-03 15:40:23 -04:00

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 1.26. (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.