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The easiest, most secure way to use WireGuard and 2FA.
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Mike O'Driscoll 3cc7b8530c
prober: fix queuing delay probe txRecords overflow under high DERP server load (#18803) 
The txRecords buffer had two compounding bugs that caused the
overflow guard to fire on every send tick under high DERP server load,
spamming logs at the full send rate (e.g. 100x/second).

First, int(packetTimeout.Seconds()) truncates fractional-second timeouts,
under-allocating the buffer. Second, the capacity was sized to exactly the
theoretical maximum number of in-flight records with no headroom,
and the expiry check used strict > rather than >=, so records at exactly
the timeout boundary were never evicted by applyTimeouts,
leaving len==cap on the very next tick.

Fixes tailscale/corp#37696

Signed-off-by: Mike O'Driscoll <mikeo@tailscale.com>
2026-03-06 09:54:25 -05:00
.bencher bencher: add config to suppress failures on benchmark regressions. 2021-10-01 16:16:02 -07:00
.github go.toolchain.branch: switch to Go 1.26 2026-03-04 21:57:05 -08:00
appc appc,feature/conn25,net: Add DNS response interception for conn25 2026-02-20 07:43:37 -08:00
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 cmd/tailscale,ipn,net/netutil: remove rp_filter strict mode warnings (#18863) 2026-03-04 14:09:19 -05:00
clientupdate clientupdate,net/tstun: add support for OpenWrt 25.12.0 using apk (#18545) 2026-03-05 13:39:07 -05:00
cmd types/ptr: deprecate ptr.To, use Go 1.26 new 2026-03-05 20:13:18 -08:00
control control/controlbase: deflake, speed up TestConnMemoryOverhead 2026-03-06 06:19:11 -08:00
derp all: remove AUTHORS file and references to it 2026-01-23 15:49:45 -08:00
disco all: remove AUTHORS file and references to it 2026-01-23 15:49:45 -08:00
docs all: remove AUTHORS file and references to it 2026-01-23 15:49:45 -08:00
doctor all: remove AUTHORS file and references to it 2026-01-23 15:49:45 -08:00
drive all: fix typos in comments 2026-03-05 13:52:01 -08:00
envknob all: remove AUTHORS file and references to it 2026-01-23 15:49:45 -08:00
feature types/ptr: deprecate ptr.To, use Go 1.26 new 2026-03-05 20:13:18 -08:00
gokrazy gokrazy: use monorepo for gokrazy appliance builds (monogok) 2026-02-13 16:19:14 -08:00
health cmd/tailscale,ipn,net/netutil: remove rp_filter strict mode warnings (#18863) 2026-03-04 14:09:19 -05:00
hostinfo types/ptr: deprecate ptr.To, use Go 1.26 new 2026-03-05 20:13:18 -08:00
internal cmd/tailscale/cli: allow fetching keys from AWS Parameter Store 2026-01-29 18:09:56 -05:00
ipn ipnext,ipnlocal: add ExtraWireGuardAllowedIPs hook 2026-03-06 09:42:44 -05:00
jsondb all: remove AUTHORS file and references to it 2026-01-23 15:49:45 -08:00
k8s-operator types/ptr: deprecate ptr.To, use Go 1.26 new 2026-03-05 20:13:18 -08:00
kube types/ptr: deprecate ptr.To, use Go 1.26 new 2026-03-05 20:13:18 -08:00
licenses licenses: update license notices 2026-03-02 08:04:19 -08:00
log all: remove AUTHORS file and references to it 2026-01-23 15:49:45 -08:00
logpolicy all: remove AUTHORS file and references to it 2026-01-23 15:49:45 -08:00
logtail logtail/filch: fix filch test panic (#18660) 2026-02-10 13:24:00 -08:00
maths all: remove AUTHORS file and references to it 2026-01-23 15:49:45 -08:00
metrics all: remove AUTHORS file and references to it 2026-01-23 15:49:45 -08:00
net types/ptr: deprecate ptr.To, use Go 1.26 new 2026-03-05 20:13:18 -08:00
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 portlist: also tb.Skip benchmarks (not just tests) on bad Linux kernels 2026-02-12 13:19:09 -08:00
posture all: remove AUTHORS file and references to it 2026-01-23 15:49:45 -08:00
prober prober: fix queuing delay probe txRecords overflow under high DERP server load (#18803) 2026-03-06 09:54:25 -05:00
proxymap all: remove AUTHORS file and references to it 2026-01-23 15:49:45 -08:00
release all: remove AUTHORS file and references to it 2026-01-23 15:49:45 -08:00
safesocket all: fix typos in comments 2026-03-05 13:52:01 -08:00
safeweb all: remove AUTHORS file and references to it 2026-01-23 15:49:45 -08:00
scripts scripts/installer.sh: handle KDE Linux (#18861) 2026-03-02 18:29:49 +00:00
sessionrecording all: remove AUTHORS file and references to it 2026-01-23 15:49:45 -08:00
ssh/tailssh types/ptr: deprecate ptr.To, use Go 1.26 new 2026-03-05 20:13:18 -08:00
syncs all: remove AUTHORS file and references to it 2026-01-23 15:49:45 -08:00
tailcfg types/ptr: deprecate ptr.To, use Go 1.26 new 2026-03-05 20:13:18 -08:00
tempfork feature/c2n: move answerC2N code + deps out of control/controlclient 2025-10-04 13:16:49 -07:00
tka all: fix typos in comments 2026-03-05 13:52:01 -08:00
tool tool/listpkgs: add --affected-by-tag 2026-02-25 11:41:33 -08:00
tsconsensus tsconsensus: fix race condition in TestOnlyTaggedPeersCanBeDialed 2026-02-17 14:39:02 -07:00
tsconst all: remove AUTHORS file and references to it 2026-01-23 15:49:45 -08:00
tsd wgengine/netstack: add local tailscale service IPs to route and terminate locally (#18461) 2026-01-30 16:46:03 -05:00
tsnet types/ptr: deprecate ptr.To, use Go 1.26 new 2026-03-05 20:13:18 -08:00
tstest types/ptr: deprecate ptr.To, use Go 1.26 new 2026-03-05 20:13:18 -08:00
tstime all: remove AUTHORS file and references to it 2026-01-23 15:49:45 -08:00
tsweb tsweb/varz: remove unnecessary Map.Init() calls in tests 2026-02-06 18:35:30 +00:00
types types/ptr: deprecate ptr.To, use Go 1.26 new 2026-03-05 20:13:18 -08:00
util types/ptr: deprecate ptr.To, use Go 1.26 new 2026-03-05 20:13:18 -08:00
version go.toolchain.branch: switch to Go 1.26 2026-03-04 21:57:05 -08:00
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 types/ptr: deprecate ptr.To, use Go 1.26 new 2026-03-05 20:13:18 -08:00
wif all: remove AUTHORS file and references to it 2026-01-23 15:49:45 -08:00
words all: remove AUTHORS file and references to it 2026-01-23 15:49:45 -08:00
.gitattributes .: add .gitattributes entry to use Go hunk-header driver 2021-12-03 17:56:02 -08:00
.gitignore Add .stignore for syncthing (#18540) 2026-01-27 16:15:17 -08:00
.golangci.yml .github: Bump golangci/golangci-lint-action from 6.5.0 to 7.0.0 (#15476) 2025-04-14 16:04:36 -06:00
.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 build_dist.sh: keep --extra-small making a usable build, add --min 2025-10-06 21:15:25 -07:00
build_docker.sh build_docker.sh: support including extra files (#17405) 2025-10-02 13:29:03 +01:00
CODE_OF_CONDUCT.md CODE_OF_CONDUCT.md: update code of conduct 2025-10-28 08:58:00 -07:00
CODEOWNERS CODEOWNERS: add the start of an owners file 2023-08-16 15:57:29 -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 go.mod: bump staticcheck to version that supports Go 1.26 2026-03-05 14:28:58 -08:00
go.mod go.mod: bump staticcheck to version that supports Go 1.26 2026-03-05 14:28:58 -08:00
go.mod.sri go.mod: bump staticcheck to version that supports Go 1.26 2026-03-05 14:28:58 -08:00
go.sum go.mod: bump staticcheck to version that supports Go 1.26 2026-03-05 14:28:58 -08:00
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.toolchain.next.rev: update to final Go 1.26.0 [next] 2026-02-10 20:44:30 -08:00
go.toolchain.rev go.toolchain.branch: switch to Go 1.26 2026-03-04 21:57:05 -08:00
go.toolchain.rev.sri go.toolchain.branch: switch to Go 1.26 2026-03-04 21:57:05 -08:00
go.toolchain.version go.toolchain.branch: switch to Go 1.26 2026-03-04 21:57:05 -08:00
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 Makefile, cmd/*/depaware.txt: split out vendor packages explicitly 2025-10-01 13:02:06 -07:00
PATENTS Move Linux client & common packages into a public repo. 2020-02-09 09:32:57 -08:00
pkgdoc_test.go gokrazy: use monorepo for gokrazy appliance builds (monogok) 2026-02-13 16:19:14 -08:00
pull-toolchain.sh go.toolchain.{rev,next.rev}: update to Go 1.25.7 / Go 1.26rc3 (#18633) 2026-02-06 12:54:11 -08:00
README.md README: update the version of Go in the README 2025-09-29 22:09:25 +01:00
SECURITY.md Add a SECURITY.md for vulnerability reports. 2020-02-11 10:26:41 -08:00
shell.nix go.mod: bump staticcheck to version that supports Go 1.26 2026-03-05 14:28:58 -08:00
staticcheck.conf all: cleanup unused code, part 2 (#10670) 2023-12-21 17:40:03 -08:00
update-flake.sh flake.nix: update Nix to use tailscale/go 1.25.2 (#17500) 2025-10-08 14:37:47 -04:00
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 v1.97.0 (#18898) 2026-03-05 15:24:48 -05:00

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:

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 1.25. (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:

Legal

WireGuard is a registered trademark of Jason A. Donenfeld.