diff --git a/src/bicep/mlz.bicep b/src/bicep/mlz.bicep
index 75fdff887..d81e01b62 100644
--- a/src/bicep/mlz.bicep
+++ b/src/bicep/mlz.bicep
@@ -77,6 +77,7 @@ module hubNetwork './modules/hubNetwork.bicep' = {
     firewallSkuTier: firewallSkuTier
     firewallPolicyName: firewallPolicyName
     firewallThreatIntelMode: firewallThreatIntelMode
+    firewallIntrusionDetectionMode: firewallIntrusionDetectionMode
     firewallDiagnosticsLogs: firewallDiagnosticsLogs
     firewallDiagnosticsMetrics: firewallDiagnosticsMetrics
     firewallClientIpConfigurationName: firewallClientIpConfigurationName
@@ -349,7 +350,21 @@ param firewallName string = 'firewall'
 param firewallManagementSubnetAddressPrefix string = '10.0.100.64/26'
 param firewallClientSubnetAddressPrefix string = '10.0.100.0/26'
 param firewallPolicyName string = 'firewall-policy'
+
+@allowed([
+  'Alert'
+  'Deny'
+  'Off'
+])
 param firewallThreatIntelMode string = 'Alert'
+
+@allowed([
+  'Alert'
+  'Deny'
+  'Off'
+])
+param firewallIntrusionDetectionMode string = 'Alert'
+
 param firewallDiagnosticsLogs array = [
   {
     category: 'AzureFirewallApplicationRule'
diff --git a/src/bicep/mlz.json b/src/bicep/mlz.json
index 7f5a21a59..416036160 100644
--- a/src/bicep/mlz.json
+++ b/src/bicep/mlz.json
@@ -5,7 +5,7 @@
     "_generator": {
       "name": "bicep",
       "version": "0.4.1008.15138",
-      "templateHash": "15227849893402646033"
+      "templateHash": "10286368957514163169"
     }
   },
   "parameters": {
@@ -132,7 +132,21 @@
     },
     "firewallThreatIntelMode": {
       "type": "string",
-      "defaultValue": "Alert"
+      "defaultValue": "Alert",
+      "allowedValues": [
+        "Alert",
+        "Deny",
+        "Off"
+      ]
+    },
+    "firewallIntrusionDetectionMode": {
+      "type": "string",
+      "defaultValue": "Alert",
+      "allowedValues": [
+        "Alert",
+        "Deny",
+        "Off"
+      ]
     },
     "firewallDiagnosticsLogs": {
       "type": "array",
@@ -1134,6 +1148,9 @@
           "firewallThreatIntelMode": {
             "value": "[parameters('firewallThreatIntelMode')]"
           },
+          "firewallIntrusionDetectionMode": {
+            "value": "[parameters('firewallIntrusionDetectionMode')]"
+          },
           "firewallDiagnosticsLogs": {
             "value": "[parameters('firewallDiagnosticsLogs')]"
           },
@@ -1202,7 +1219,7 @@
             "_generator": {
               "name": "bicep",
               "version": "0.4.1008.15138",
-              "templateHash": "13599565970900573060"
+              "templateHash": "5914406162434941149"
             }
           },
           "parameters": {
@@ -1285,7 +1302,20 @@
               "type": "string"
             },
             "firewallThreatIntelMode": {
-              "type": "string"
+              "type": "string",
+              "allowedValues": [
+                "Alert",
+                "Deny",
+                "Off"
+              ]
+            },
+            "firewallIntrusionDetectionMode": {
+              "type": "string",
+              "allowedValues": [
+                "Alert",
+                "Deny",
+                "Off"
+              ]
             },
             "firewallDiagnosticsLogs": {
               "type": "array"
@@ -2101,6 +2131,9 @@
                   "threatIntelMode": {
                     "value": "[parameters('firewallThreatIntelMode')]"
                   },
+                  "intrusionDetectionMode": {
+                    "value": "[parameters('firewallIntrusionDetectionMode')]"
+                  },
                   "clientIpConfigurationName": {
                     "value": "[parameters('firewallClientIpConfigurationName')]"
                   },
@@ -2139,7 +2172,7 @@
                     "_generator": {
                       "name": "bicep",
                       "version": "0.4.1008.15138",
-                      "templateHash": "16515753424142002553"
+                      "templateHash": "6929052309016745644"
                     }
                   },
                   "parameters": {
@@ -2158,7 +2191,20 @@
                       "type": "string"
                     },
                     "threatIntelMode": {
-                      "type": "string"
+                      "type": "string",
+                      "allowedValues": [
+                        "Alert",
+                        "Deny",
+                        "Off"
+                      ]
+                    },
+                    "intrusionDetectionMode": {
+                      "type": "string",
+                      "allowedValues": [
+                        "Alert",
+                        "Deny",
+                        "Off"
+                      ]
                     },
                     "clientIpConfigurationName": {
                       "type": "string"
@@ -2204,6 +2250,9 @@
                       "tags": "[parameters('tags')]",
                       "properties": {
                         "threatIntelMode": "[parameters('threatIntelMode')]",
+                        "intrusionDetection": {
+                          "mode": "[parameters('intrusionDetectionMode')]"
+                        },
                         "sku": {
                           "tier": "[parameters('skuTier')]"
                         }
diff --git a/src/bicep/modules/firewall.bicep b/src/bicep/modules/firewall.bicep
index 1efc74817..a0089f6b5 100644
--- a/src/bicep/modules/firewall.bicep
+++ b/src/bicep/modules/firewall.bicep
@@ -3,8 +3,21 @@ param location string = resourceGroup().location
 param tags object = {}
 
 param skuTier string
+
+@allowed([
+  'Alert'
+  'Deny'
+  'Off'
+])
 param threatIntelMode string
 
+@allowed([
+  'Alert'
+  'Deny'
+  'Off'
+])
+param intrusionDetectionMode string
+
 param clientIpConfigurationName string
 param clientIpConfigurationSubnetResourceId string
 param clientIpConfigurationPublicIPAddressResourceId string
@@ -27,6 +40,9 @@ resource firewallPolicy 'Microsoft.Network/firewallPolicies@2021-02-01' = {
   tags: tags
   properties: {
     threatIntelMode: threatIntelMode
+    intrusionDetection:{
+      mode: intrusionDetectionMode
+    }
     sku: {
       tier: skuTier
     }
diff --git a/src/bicep/modules/hubNetwork.bicep b/src/bicep/modules/hubNetwork.bicep
index 98da70e5e..3783aea53 100644
--- a/src/bicep/modules/hubNetwork.bicep
+++ b/src/bicep/modules/hubNetwork.bicep
@@ -29,7 +29,20 @@ param routeTableRouteNextHopType string = 'VirtualAppliance'
 param firewallName string
 param firewallSkuTier string
 param firewallPolicyName string
+
+@allowed([
+  'Alert'
+  'Deny'
+  'Off'
+])
 param firewallThreatIntelMode string
+
+@allowed([
+  'Alert'
+  'Deny'
+  'Off'
+])
+param firewallIntrusionDetectionMode string
 param firewallDiagnosticsLogs array
 param firewallDiagnosticsMetrics array
 param firewallClientIpConfigurationName string
@@ -201,7 +214,7 @@ module firewall './firewall.bicep' = {
 
     firewallPolicyName: firewallPolicyName
     threatIntelMode: firewallThreatIntelMode
-
+    intrusionDetectionMode: firewallIntrusionDetectionMode
     clientIpConfigurationName: firewallClientIpConfigurationName
     clientIpConfigurationSubnetResourceId: '${virtualNetwork.outputs.id}/subnets/${firewallClientSubnetName}'
     clientIpConfigurationPublicIPAddressResourceId: firewallClientPublicIPAddress.outputs.id