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Fallback to accepting only NEW output public traffic if conntrack netlink isn't supported

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This commit is contained in:
Quentin McGaw
2026-02-26 15:53:07 +00:00
parent dfac2b2f1a
commit a37354426b
16 changed files with 302 additions and 36 deletions
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internal/pmtud/tcp/mss.go
+1 -1
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@@ -43,7 +43,7 @@ func findHighestMSSDestination(ctx context.Context, familyToFD map[int]fileDescr
if result.err != nil {
switch {
case err != nil: // error already occurred for another findMSS goroutine
case errors.Is(result.err, iptables.ErrMarkMatchModuleMissing):
case errors.Is(result.err, iptables.ErrKernelModuleMissing):
err = fmt.Errorf("finding MSS for %s: %w", result.dst, result.err)
case dst.Addr().Is6() && errors.Is(result.err, ip.ErrNetworkUnreachable):
// silently discard IPv6 network unreachable errors since they are common