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various: disable stateful filtering by default (#12197)

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After some analysis, stateful filtering is only necessary in tailnets
that use `autogroup:danger-all` in `src` in ACLs. And in those cases
users explicitly specify that hosts outside of the tailnet should be
able to reach their nodes. To fix local DNS breakage in containers, we
disable stateful filtering by default.

Updates #12108

Signed-off-by: Andrew Lytvynov <awly@tailscale.com>
This commit is contained in:
Andrew Lytvynov
2024-05-20 11:44:29 -07:00
committed by GitHub
parent 6db1219185
commit c9179bc261
8 changed files with 159 additions and 246 deletions
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2
wgengine/router/router_linux.go
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@@ -469,7 +469,7 @@ func (r *linuxRouter) updateStatefulFilteringWithDockerWarning(cfg *Config) {
if _, found := ifstate.Interface["docker0"]; found {
r.health.SetWarnable(warnStatefulFilteringWithDocker, fmt.Errorf(""+
"Stateful filtering is enabled and Docker was detected; this may prevent Docker containers "+
"on this host from connecting to Tailscale nodes. "+
"on this host from resolving DNS and connecting to Tailscale nodes. "+
"See https://tailscale.com/s/stateful-docker",
))
return