From 6dfd0dffe0f3cc36e44a2cd26b2d1480eac35825 Mon Sep 17 00:00:00 2001
From: xiaoqidun <xiaoqidun@gmail.com>
Date: Wed, 28 Jan 2026 20:39:10 +0800
Subject: [PATCH] =?UTF-8?q?fix(=E4=BF=AE=E5=A4=8D=E9=97=AE=E9=A2=98):=20?=
 =?UTF-8?q?=E4=BF=AE=E5=A4=8DMapping=3DUnknown=E6=97=B6=E8=AF=AF=E5=88=A4?=
 =?UTF-8?q?=E4=B8=BASymmetric?=
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---
 probe_nat.go | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/probe_nat.go b/probe_nat.go
index 3a691ec..a36b841 100644
--- a/probe_nat.go
+++ b/probe_nat.go
@@ -303,6 +303,8 @@ func DetectNAT(conn net.PacketConn, primarySTUN, secondarySTUN, network string,
 		if res.Mapping == MappingUnknown {
 			res.Mapping = MappingEndpointIndependent
 		}
+	} else if res.Mapping == MappingUnknown {
+		res.Type = NATUnknown
 	} else if res.Mapping == MappingEndpointIndependent {
 		switch res.Filtering {
 		case FilteringAddressDependent: