From a0c82f96559f3975233d101ade51cda7b5d5922e Mon Sep 17 00:00:00 2001
From: chgchi <7640124@qq.com>
Date: Tue, 16 Dec 2025 16:06:36 +0800
Subject: [PATCH] fix a bug for wireguard server ipv6

---
 plugins/interface/amneziawg_intf_plugin.js | 8 ++------
 plugins/interface/wireguard_intf_plugin.js | 1 +
 2 files changed, 3 insertions(+), 6 deletions(-)

diff --git a/plugins/interface/amneziawg_intf_plugin.js b/plugins/interface/amneziawg_intf_plugin.js
index 1ddc81eb..e5045c37 100644
--- a/plugins/interface/amneziawg_intf_plugin.js
+++ b/plugins/interface/amneziawg_intf_plugin.js
@@ -58,12 +58,8 @@ class AmneziawgInterfacePlugin extends WireguardInterfacePlugin {
   }
 
   getDefaultMTU() {
-    // in case wireguard is 1412:
-    // Obfuscation mode (H1–H4/S1–S2, etc. enabled)    +4~8 bytes
-    // High obfuscation (with JC/JMIN/JMAX enabled + random padding)  +8~16 bytes
-    // Leave an 8-byte safety margin to prevent PMTU ICMP anomalies.
-    // 1412 - 8 - 16 - 8 = 1380
-    return 1380;
+    // since official amneziawg client (both mac and windows) is using 1376 as MTU, we use the same value here
+    return 1376;
   }
 
 
diff --git a/plugins/interface/wireguard_intf_plugin.js b/plugins/interface/wireguard_intf_plugin.js
index 038a34a0..3794b521 100644
--- a/plugins/interface/wireguard_intf_plugin.js
+++ b/plugins/interface/wireguard_intf_plugin.js
@@ -176,6 +176,7 @@ class WireguardInterfacePlugin extends InterfaceBasePlugin {
     const v4Subnets = this.networkConfig.ipv4s ? this.networkConfig.ipv4s.map(addr => new Address4(addr)) : [new Address4(this.networkConfig.ipv4)];
     let v6Subnets = [];
     if (this.networkConfig.ipv6) {
+      const ipv6 = this.networkConfig.ipv6;
       v6Subnets.push(...(_.isArray(ipv6) ? ipv6.map(addr => new Address6(addr)) : [new Address6(ipv6)]));
     }
     if (_.isArray(this.networkConfig.peers)) {