fix(devtunnel): use 1280 mtu (#2420)

coadler · web-flow · commit c36b0d892bdc · 2022-06-16T12:12:04.000-05:00
This should be more compatible with cloud VMs and VPNs.
diff --git a/coderd/devtunnel/tunnel.go b/coderd/devtunnel/tunnel.go
@@ -59,7 +59,7 @@ func NewWithConfig(ctx context.Context, logger slog.Logger, cfg Config) (*Tunnel
 	tun, tnet, err := netstack.CreateNetTUN(
 		[]netip.Addr{netip.AddrFrom16(cfg.ID)},
 		[]netip.Addr{netip.AddrFrom4([4]byte{1, 1, 1, 1})},
-		1420,
+		1280,
 	)
 	if err != nil {
 		return nil, nil, xerrors.Errorf("create net TUN: %w", err)

Original file line number	Diff line number	Diff line change
`@@ -59,7 +59,7 @@ func NewWithConfig(ctx context.Context, logger slog.Logger, cfg Config) (*Tunnel`
`59`	`59`	`tun, tnet, err := netstack.CreateNetTUN(`
`60`	`60`	`[]netip.Addr{netip.AddrFrom16(cfg.ID)},`
`61`	`61`	`[]netip.Addr{netip.AddrFrom4([4]byte{1, 1, 1, 1})},`
`62`		`- 1420,`
	`62`	`+ 1280,`
`63`	`63`	`)`
`64`	`64`	`if err != nil {`
`65`	`65`	`return nil, nil, xerrors.Errorf("create net TUN: %w", err)`