diff --git a/specification/network/resource-manager/Microsoft.Network/stable/2021-05-01/examples/VirtualNetworkGatewayNatRuleGet.json b/specification/network/resource-manager/Microsoft.Network/stable/2021-05-01/examples/VirtualNetworkGatewayNatRuleGet.json
index 95886961317b..c2610df01e10 100644
--- a/specification/network/resource-manager/Microsoft.Network/stable/2021-05-01/examples/VirtualNetworkGatewayNatRuleGet.json
+++ b/specification/network/resource-manager/Microsoft.Network/stable/2021-05-01/examples/VirtualNetworkGatewayNatRuleGet.json
@@ -19,12 +19,14 @@
           "ipConfigurationId": "/subscriptions/subid/resourceGroups/rg1/providers/Microsoft.Network/virtualNetworkGateways/gateway1/ipConfigurations/default",
           "internalMappings": [
             {
-              "addressSpace": "10.4.0.0/24"
+              "addressSpace": "10.4.0.0/24",
+              "portRange": "100-100"
             }
           ],
           "externalMappings": [
             {
-              "addressSpace": "50.4.0.0/24"
+              "addressSpace": "50.4.0.0/24",
+              "portRange": "200-200"
             }
           ]
         }
diff --git a/specification/network/resource-manager/Microsoft.Network/stable/2021-05-01/examples/VirtualNetworkGatewayNatRulePut.json b/specification/network/resource-manager/Microsoft.Network/stable/2021-05-01/examples/VirtualNetworkGatewayNatRulePut.json
index d74e3d7fadc8..3165dcf0737f 100644
--- a/specification/network/resource-manager/Microsoft.Network/stable/2021-05-01/examples/VirtualNetworkGatewayNatRulePut.json
+++ b/specification/network/resource-manager/Microsoft.Network/stable/2021-05-01/examples/VirtualNetworkGatewayNatRulePut.json
@@ -12,12 +12,14 @@
         "ipConfigurationId": "/subscriptions/subid/resourceGroups/rg1/providers/Microsoft.Network/virtualNetworkGateways/gateway1/ipConfigurations/default",
         "internalMappings": [
           {
-            "addressSpace": "10.4.0.0/24"
+            "addressSpace": "10.4.0.0/24",
+            "portRange": "200-300"
           }
         ],
         "externalMappings": [
           {
-            "addressSpace": "192.168.21.0/24"
+            "addressSpace": "192.168.21.0/24",
+            "portRange": "300-400"
           }
         ]
       }
@@ -36,12 +38,14 @@
           "ipConfigurationId": "/subscriptions/subid/resourceGroups/rg1/providers/Microsoft.Network/virtualNetworkGateways/gateway1/ipConfigurations/default",
           "internalMappings": [
             {
-              "addressSpace": "10.4.0.0/24"
+              "addressSpace": "10.4.0.0/24",
+              "portRange": "200-300"
             }
           ],
           "externalMappings": [
             {
-              "addressSpace": "192.168.21.0/24"
+              "addressSpace": "192.168.21.0/24",
+              "portRange": "300-400"
             }
           ]
         }
@@ -59,12 +63,14 @@
           "ipConfigurationId": "/subscriptions/subid/resourceGroups/rg1/providers/Microsoft.Network/virtualNetworkGateways/gateway1/ipConfigurations/default",
           "internalMappings": [
             {
-              "addressSpace": "10.4.0.0/24"
+              "addressSpace": "10.4.0.0/24",
+              "portRange": "200-300"
             }
           ],
           "externalMappings": [
             {
-              "addressSpace": "192.168.21.0/24"
+              "addressSpace": "192.168.21.0/24",
+              "portRange": "300-400"
             }
           ]
         }
diff --git a/specification/network/resource-manager/Microsoft.Network/stable/2021-05-01/virtualWan.json b/specification/network/resource-manager/Microsoft.Network/stable/2021-05-01/virtualWan.json
index fb5d989c1f16..48f4fa2302bf 100644
--- a/specification/network/resource-manager/Microsoft.Network/stable/2021-05-01/virtualWan.json
+++ b/specification/network/resource-manager/Microsoft.Network/stable/2021-05-01/virtualWan.json
@@ -6445,6 +6445,10 @@
         "addressSpace": {
           "type": "string",
           "description": "Address space for Vpn NatRule mapping."
+        },
+        "portRange": {
+          "type": "string",
+          "description": "Port range for Vpn NatRule mapping."
         }
       },
       "description": "Vpn NatRule mapping."