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hotfix(pmtud/tcp): block kernel from racing to send RST packets

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- this makes PMTUD TCP reliable
- this only works on kernels with the mark module
- on kernels without the mark module, the icmp pmtud mtu found is used
This commit is contained in:
Quentin McGaw
2026-02-17 19:33:51 +00:00
parent 5f903d1fbf
commit 04d7cef294
15 changed files with 226 additions and 27 deletions
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internal/vpn/interfaces.go
+2
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@@ -8,6 +8,7 @@ import (
"github.com/qdm12/gluetun/internal/configuration/settings"
"github.com/qdm12/gluetun/internal/models"
"github.com/qdm12/gluetun/internal/netlink"
"github.com/qdm12/gluetun/internal/pmtud/tcp"
portforward "github.com/qdm12/gluetun/internal/portforward"
"github.com/qdm12/gluetun/internal/provider"
"github.com/qdm12/gluetun/internal/provider/utils"
@@ -17,6 +18,7 @@ type Firewall interface {
SetVPNConnection(ctx context.Context, connection models.Connection, interfaceName string) error
SetAllowedPort(ctx context.Context, port uint16, interfaceName string) error
RemoveAllowedPort(ctx context.Context, port uint16) error
tcp.Firewall
}
type Routing interface {