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James Tucker 2249be1ac8 derp/derpserver, cmd/derper: add optional TCP_SAVE_SYN MSS metrics 
Add --tcp-save-syn on Linux to record client MSS in a Prometheus histogram. Count retrieval outcomes separately and limit saved-SYN error logs to one per ten minutes across clients. IPv6 extension headers are unsupported.

Estimate the network-namespace SYN rate from kernel counters once per second. Disable TCP_SAVE_SYN on listeners above 100,000/s or if rate measurement fails, leaving it off until restart.

Updates tailscale/corp#49139

Signed-off-by: James Tucker <james@tailscale.com>
2026-10-07 09:37:39 -07:00
..
addlicense
all: remove AUTHORS file and references to it
2026-01-23 15:49:45 -08:00
build-webclient
tsweb/compserve, client/web: add zstd, remove brotli for precompressed assets
2026-09-17 15:23:49 -07:00
checkmetrics
all: remove AUTHORS file and references to it
2026-01-23 15:49:45 -08:00
cigocacher
go.mod,cmd/cigocacher: migrate to depending on tb (#21627)
2026-10-02 10:59:48 +01:00
cloner
cmd: apply go fix
2026-07-10 14:26:11 -07:00
connector-gen
all: remove AUTHORS file and references to it
2026-01-23 15:49:45 -08:00
containerboot
cmd/containerboot: recover from IPN watch closure (#21374)
2026-09-23 10:36:01 +01:00
derper
derp/derpserver, cmd/derper: add optional TCP_SAVE_SYN MSS metrics
2026-10-07 09:37:39 -07:00
derpprobe
all: remove AUTHORS file and references to it
2026-01-23 15:49:45 -08:00
dist
all: remove AUTHORS file and references to it
2026-01-23 15:49:45 -08:00
distsign
all: remove AUTHORS file and references to it
2026-01-23 15:49:45 -08:00
fbstatus
cmd/tailscale: add 'configure pve-appliance' to make Proxmox VM of appliance
2026-07-07 13:12:13 -07:00
featuretags
tstest/natlab/vmtest, gokrazy, cmd/tailscale/cli: add minimal-build vmtests
2026-09-30 15:53:47 -07:00
get-authkey
all: remove AUTHORS file and references to it
2026-01-23 15:49:45 -08:00
gitops-pusher
go.mod: bump staticcheck in prep for Go 1.27, address fallout
2026-07-31 08:00:40 -07:00
hello
tailcfg,tailcfg/{nodecap,selfcap}: split capability constants to their own packages (#20639)
2026-08-07 16:30:35 -07:00
jsonimports
all: remove AUTHORS file and references to it
2026-01-23 15:49:45 -08:00
k8s-nameserver
all: don't repeat the the word "the" unnecessarily
2026-06-18 16:32:08 +01:00
k8s-operator
feature/exitnodehealth: warn when selected exit nodes are unavailable (#21017)
2026-10-01 08:57:20 -04:00
k8s-proxy
go.mod: bump all direct deps to latest
2026-09-16 16:01:50 -07:00
mkmanifest
all: remove AUTHORS file and references to it
2026-01-23 15:49:45 -08:00
mkpkg
go.mod: bump all direct deps to latest
2026-09-16 16:01:50 -07:00
mkversion
version/mkversion: allow supplying the complete version via env vars
2026-09-29 15:42:05 -07:00
nardump
tool/updateflakes, cmd/nardump: replace update-flake.sh with Go tool
2026-04-28 10:18:32 -07:00
natc
staticcheck.conf: enable ST1000 to check package docs (#20787)
2026-08-08 13:02:06 -07:00
netlogfmt
cmd/tailscale/cli: fix time in tailscale routecheck (#19956)
2026-06-01 16:12:08 -07:00
nginx-auth
all: remove AUTHORS file and references to it
2026-01-23 15:49:45 -08:00
omitsize
all: remove AUTHORS file and references to it
2026-01-23 15:49:45 -08:00
pgproxy
cmd/pgproxy: fix client TLS handshake timeout
2026-05-11 11:12:11 -07:00
printdep
cmd/printdep: add --next flag to use rc Go build hash instead
2026-01-27 14:49:56 -08:00
proxy-test-server
all: remove AUTHORS file and references to it
2026-01-23 15:49:45 -08:00
proxy-to-grafana
tailcfg,tailcfg/{nodecap,selfcap}: split capability constants to their own packages (#20639)
2026-08-07 16:30:35 -07:00
sniproxy
ipn, ipn/ipnlocal: remove Notify.NetMap, size initial status to subscription
2026-09-14 09:37:30 -07:00
speedtest
all: use Go 1.26 things, run most gofix modernizers
2026-03-06 13:32:03 -08:00
ssh-auth-none-demo
cmd/ssh-auth-none-demo: update SSH demo a bit
2026-06-03 19:36:19 -07:00
stunc
all: remove AUTHORS file and references to it
2026-01-23 15:49:45 -08:00
stund
net/dns,util/coalescedop: serialize and coalesce DNS flush calls on Windows
2026-09-30 10:44:22 -07:00
stunstamp
tailcfg: replace int with DERPRegionID for additional type safety (#20646)
2026-08-19 16:25:50 -07:00
sync-containers
all: remove AUTHORS file and references to it
2026-01-23 15:49:45 -08:00
systray
client/systray: support several different color themes
2026-04-27 18:54:14 -07:00
tailscale
types/key: rename NLPublic/Private to TLPublic/Private
2026-10-02 16:03:51 +01:00
tailscaled
ipn/ipnlocal: drop the appc import from ts_omit_appconnectors builds
2026-10-06 13:12:00 -07:00
testcontrol
cmd/testcontrol: add --addr and --ssh-policy flags
2026-09-15 20:03:21 -07:00
testwrapper
cmd/testwrapper: run all package patterns in one go test invocation
2026-09-18 02:56:29 -07:00
tl-longchain
types/key: rename NLPublic/Private to TLPublic/Private
2026-10-02 16:03:51 +01:00
tsconnect
feature/featuretags: add MinTags, use it in three places
2026-09-30 07:42:13 -07:00
tsidp
feature/exitnodehealth: warn when selected exit nodes are unavailable (#21017)
2026-10-01 08:57:20 -04:00
tsnet-proxy
cmd/tsnet-proxy: add tsnet-based port proxy tool (#19468)
2026-04-22 13:34:18 -04:00
tsp
cmd: apply go fix
2026-07-10 14:26:11 -07:00
tsshd
all: remove AUTHORS file and references to it
2026-01-23 15:49:45 -08:00
tta
tstest, cmd/tta: add Tailscale SSH end-to-end VM test
2026-07-13 15:04:51 -07:00
vet
types/key: rename NLPublic/Private to TLPublic/Private
2026-10-02 16:03:51 +01:00
viewer
cmd: apply go fix
2026-07-10 14:26:11 -07:00
vnet
gokrazy, tstest, cmd/vnet: switch amd64 kernel to gokrazy/kernel.amd64
2026-07-15 11:45:02 -04:00
xdpderper
all: remove AUTHORS file and references to it
2026-01-23 15:49:45 -08:00