diff --git a/v2rayN/ServiceLib/Resx/ResUI.Designer.cs b/v2rayN/ServiceLib/Resx/ResUI.Designer.cs
index a948dee9..61b96007 100644
--- a/v2rayN/ServiceLib/Resx/ResUI.Designer.cs
+++ b/v2rayN/ServiceLib/Resx/ResUI.Designer.cs
@@ -3222,6 +3222,15 @@ namespace ServiceLib.Resx {
             }
         }
         
+        /// <summary>
+        ///   查找类似 MTU 的本地化字符串。
+        /// </summary>
+        public static string TbMtu {
+            get {
+                return ResourceManager.GetString("TbMtu", resourceCulture);
+            }
+        }
+        
         /// <summary>
         ///   查找类似 Transport protocol(network) 的本地化字符串。
         /// </summary>
@@ -4365,15 +4374,6 @@ namespace ServiceLib.Resx {
             }
         }
         
-        /// <summary>
-        ///   查找类似 MTU 的本地化字符串。
-        /// </summary>
-        public static string TbSettingsTunMtu {
-            get {
-                return ResourceManager.GetString("TbSettingsTunMtu", resourceCulture);
-            }
-        }
-        
         /// <summary>
         ///   查找类似 Stack 的本地化字符串。
         /// </summary>
diff --git a/v2rayN/ServiceLib/Resx/ResUI.fa-Ir.resx b/v2rayN/ServiceLib/Resx/ResUI.fa-Ir.resx
index c3f53c89..dd1895e3 100644
--- a/v2rayN/ServiceLib/Resx/ResUI.fa-Ir.resx
+++ b/v2rayN/ServiceLib/Resx/ResUI.fa-Ir.resx
@@ -1062,7 +1062,7 @@
   <data name="TbSettingsTunStack" xml:space="preserve">
     <value>پشته شبکه</value>
   </data>
-  <data name="TbSettingsTunMtu" xml:space="preserve">
+  <data name="TbMtu" xml:space="preserve">
     <value>MTU</value>
   </data>
   <data name="TbSettingsEnableIPv6Address" xml:space="preserve">
diff --git a/v2rayN/ServiceLib/Resx/ResUI.fr.resx b/v2rayN/ServiceLib/Resx/ResUI.fr.resx
index 2a5d8823..ee633bd0 100644
--- a/v2rayN/ServiceLib/Resx/ResUI.fr.resx
+++ b/v2rayN/ServiceLib/Resx/ResUI.fr.resx
@@ -1059,7 +1059,7 @@
   <data name="TbSettingsTunStack" xml:space="preserve">
     <value>Pile de protocoles</value>
   </data>
-  <data name="TbSettingsTunMtu" xml:space="preserve">
+  <data name="TbMtu" xml:space="preserve">
     <value>MTU</value>
   </data>
   <data name="TbSettingsEnableIPv6Address" xml:space="preserve">
diff --git a/v2rayN/ServiceLib/Resx/ResUI.hu.resx b/v2rayN/ServiceLib/Resx/ResUI.hu.resx
index 33656ba8..c0456ba4 100644
--- a/v2rayN/ServiceLib/Resx/ResUI.hu.resx
+++ b/v2rayN/ServiceLib/Resx/ResUI.hu.resx
@@ -1062,7 +1062,7 @@
   <data name="TbSettingsTunStack" xml:space="preserve">
     <value>Hálózati verem</value>
   </data>
-  <data name="TbSettingsTunMtu" xml:space="preserve">
+  <data name="TbMtu" xml:space="preserve">
     <value>MTU</value>
   </data>
   <data name="TbSettingsEnableIPv6Address" xml:space="preserve">
diff --git a/v2rayN/ServiceLib/Resx/ResUI.resx b/v2rayN/ServiceLib/Resx/ResUI.resx
index 9659926b..7e4275c0 100644
--- a/v2rayN/ServiceLib/Resx/ResUI.resx
+++ b/v2rayN/ServiceLib/Resx/ResUI.resx
@@ -1062,7 +1062,7 @@
   <data name="TbSettingsTunStack" xml:space="preserve">
     <value>Stack</value>
   </data>
-  <data name="TbSettingsTunMtu" xml:space="preserve">
+  <data name="TbMtu" xml:space="preserve">
     <value>MTU</value>
   </data>
   <data name="TbSettingsEnableIPv6Address" xml:space="preserve">
diff --git a/v2rayN/ServiceLib/Resx/ResUI.ru.resx b/v2rayN/ServiceLib/Resx/ResUI.ru.resx
index 07e0e841..a956b5f1 100644
--- a/v2rayN/ServiceLib/Resx/ResUI.ru.resx
+++ b/v2rayN/ServiceLib/Resx/ResUI.ru.resx
@@ -1062,7 +1062,7 @@
   <data name="TbSettingsTunStack" xml:space="preserve">
     <value>Сетевой стек</value>
   </data>
-  <data name="TbSettingsTunMtu" xml:space="preserve">
+  <data name="TbMtu" xml:space="preserve">
     <value>MTU</value>
   </data>
   <data name="TbSettingsEnableIPv6Address" xml:space="preserve">
diff --git a/v2rayN/ServiceLib/Resx/ResUI.zh-Hans.resx b/v2rayN/ServiceLib/Resx/ResUI.zh-Hans.resx
index f1d0406f..6a3e2d75 100644
--- a/v2rayN/ServiceLib/Resx/ResUI.zh-Hans.resx
+++ b/v2rayN/ServiceLib/Resx/ResUI.zh-Hans.resx
@@ -1059,7 +1059,7 @@
   <data name="TbSettingsTunStack" xml:space="preserve">
     <value>协议栈</value>
   </data>
-  <data name="TbSettingsTunMtu" xml:space="preserve">
+  <data name="TbMtu" xml:space="preserve">
     <value>MTU</value>
   </data>
   <data name="TbSettingsEnableIPv6Address" xml:space="preserve">
diff --git a/v2rayN/ServiceLib/Resx/ResUI.zh-Hant.resx b/v2rayN/ServiceLib/Resx/ResUI.zh-Hant.resx
index 4dd3ea86..a197592d 100644
--- a/v2rayN/ServiceLib/Resx/ResUI.zh-Hant.resx
+++ b/v2rayN/ServiceLib/Resx/ResUI.zh-Hant.resx
@@ -1059,7 +1059,7 @@
   <data name="TbSettingsTunStack" xml:space="preserve">
     <value>協定堆疊</value>
   </data>
-  <data name="TbSettingsTunMtu" xml:space="preserve">
+  <data name="TbMtu" xml:space="preserve">
     <value>MTU</value>
   </data>
   <data name="TbSettingsEnableIPv6Address" xml:space="preserve">
diff --git a/v2rayN/v2rayN.Desktop/Views/AddServerWindow.axaml b/v2rayN/v2rayN.Desktop/Views/AddServerWindow.axaml
index 3ab748b1..1417bc99 100644
--- a/v2rayN/v2rayN.Desktop/Views/AddServerWindow.axaml
+++ b/v2rayN/v2rayN.Desktop/Views/AddServerWindow.axaml
@@ -570,7 +570,7 @@
                         Grid.Column="0"
                         Margin="{StaticResource Margin4}"
                         VerticalAlignment="Center"
-                        Text="{x:Static resx:ResUI.TbSettingsTunMtu}" />
+                        Text="{x:Static resx:ResUI.TbMtu}" />
                     <TextBox
                         x:Name="txtShortId9"
                         Grid.Row="5"
@@ -578,7 +578,7 @@
                         Width="200"
                         Margin="{StaticResource Margin4}"
                         HorizontalAlignment="Left"
-                        Watermark="1500" />
+                        Watermark="1280" />
                 </Grid>
                 <Grid
                     x:Name="gridAnytls"
@@ -850,7 +850,7 @@
                                 Grid.Column="0"
                                 Margin="{StaticResource Margin4}"
                                 VerticalAlignment="Center"
-                                Text="MTU" />
+                                Text="{x:Static resx:ResUI.TbMtu}" />
                             <TextBox
                                 x:Name="txtKcpMtu"
                                 Grid.Row="1"
diff --git a/v2rayN/v2rayN.Desktop/Views/OptionSettingWindow.axaml b/v2rayN/v2rayN.Desktop/Views/OptionSettingWindow.axaml
index c7833fe9..d47deb2e 100644
--- a/v2rayN/v2rayN.Desktop/Views/OptionSettingWindow.axaml
+++ b/v2rayN/v2rayN.Desktop/Views/OptionSettingWindow.axaml
@@ -869,7 +869,7 @@
                         Grid.Column="0"
                         Margin="{StaticResource Margin4}"
                         VerticalAlignment="Center"
-                        Text="{x:Static resx:ResUI.TbSettingsTunMtu}" />
+                        Text="{x:Static resx:ResUI.TbMtu}" />
                     <ComboBox
                         x:Name="cmbMtu"
                         Grid.Row="5"
diff --git a/v2rayN/v2rayN/Views/AddServerWindow.xaml b/v2rayN/v2rayN/Views/AddServerWindow.xaml
index 047d32e4..5ba850f5 100644
--- a/v2rayN/v2rayN/Views/AddServerWindow.xaml
+++ b/v2rayN/v2rayN/Views/AddServerWindow.xaml
@@ -753,7 +753,7 @@
                         Margin="{StaticResource Margin4}"
                         VerticalAlignment="Center"
                         Style="{StaticResource ToolbarTextBlock}"
-                        Text="{x:Static resx:ResUI.TbSettingsTunMtu}" />
+                        Text="{x:Static resx:ResUI.TbMtu}" />
                     <TextBox
                         x:Name="txtShortId9"
                         Grid.Row="5"
@@ -761,7 +761,7 @@
                         Width="200"
                         Margin="{StaticResource Margin4}"
                         HorizontalAlignment="Left"
-                        materialDesign:HintAssist.Hint="1500"
+                        materialDesign:HintAssist.Hint="1280"
                         Style="{StaticResource DefTextBox}" />
                 </Grid>
                 <Grid
@@ -1119,7 +1119,7 @@
                                 Margin="{StaticResource Margin4}"
                                 VerticalAlignment="Center"
                                 Style="{StaticResource ToolbarTextBlock}"
-                                Text="MTU" />
+                                Text="{x:Static resx:ResUI.TbMtu}" />
                             <TextBox
                                 x:Name="txtKcpMtu"
                                 Grid.Row="1"
diff --git a/v2rayN/v2rayN/Views/OptionSettingWindow.xaml b/v2rayN/v2rayN/Views/OptionSettingWindow.xaml
index 9e85b501..0a5208e3 100644
--- a/v2rayN/v2rayN/Views/OptionSettingWindow.xaml
+++ b/v2rayN/v2rayN/Views/OptionSettingWindow.xaml
@@ -469,7 +469,7 @@
                         Margin="{StaticResource Margin8}"
                         VerticalAlignment="Center"
                         Style="{StaticResource ToolbarTextBlock}"
-                        Text="{x:Static resx:ResUI.TbSettingsTunMtu}" />
+                        Text="{x:Static resx:ResUI.TbMtu}" />
                     <TextBox Style="{StaticResource DefTextBox}"
                         x:Name="txtKcpmtu"
                         Grid.Row="1"
@@ -1133,7 +1133,7 @@
                         Margin="{StaticResource Margin8}"
                         VerticalAlignment="Center"
                         Style="{StaticResource ToolbarTextBlock}"
-                        Text="{x:Static resx:ResUI.TbSettingsTunMtu}" />
+                        Text="{x:Static resx:ResUI.TbMtu}" />
                     <ComboBox
                         x:Name="cmbMtu"
                         Grid.Row="5"