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Increase default mtu under network extension to 4064

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世界 2025-07-04 10:29:55 +08:00
parent 96df69bcdc
commit 811ff93549
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1 changed files with 2 additions and 1 deletions
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3
protocol/tun/inbound.go
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@ -134,7 +134,8 @@ func NewInbound(ctx context.Context, router adapter.Router, logger log.ContextLo
tunMTU := options.MTU
if tunMTU == 0 {
if platformInterface != nil && platformInterface.UnderNetworkExtension() {
tunMTU = 4000
// In Network Extension, when MTU exceeds 4064 (4096-UTUN_IF_HEADROOM_SIZE), the performance of tun will drop significantly, which may be a system bug.
tunMTU = 4064
} else {
tunMTU = 9000
}