ASC_All_Internet_traffic_should_be_routed_via_Azure_Firewall.json

{
  "properties": {
    "displayName": "[Preview]: All Internet traffic should be routed via your deployed Azure Firewall",
    "policyType": "BuiltIn",
    "mode": "All",
    "description": "Azure Security Center has identified that some of your subnets aren't protected with a next generation firewall. Protect your subnets from potential threats by restricting access to them with Azure Firewall or a supported next generation firewall",
    "metadata": {
      "version": "3.0.0-preview",
      "category": "Network",
      "preview": true
    },
    "version": "3.0.0-preview",
    "parameters": {
      "effect": {
        "type": "string",
        "defaultValue": "AuditIfNotExists",
        "allowedValues": [
          "AuditIfNotExists",
          "Disabled"
        ],
        "metadata": {
          "displayName": "Effect",
          "description": "Enable or disable All Internet traffic should be routed via your deployed Azure Firewall"
        }
      }
    },
    "policyRule": {
      "if": {
        "allOf": [
          {
            "field": "type",
            "equals": "Microsoft.Network/virtualNetworks"
          },
          {
            "count": {
              "field": "Microsoft.Network/virtualNetworks/subnets[*]",
              "where": {
                "allOf": [
                  {
                    "count": {
                      "field": "Microsoft.Network/virtualNetworks/subnets[*].ipConfigurations[*]",
                      "where": {
                        "value": "[empty(field('Microsoft.Network/virtualNetworks/subnets[*].ipConfigurations[*].id'))]",
                        "equals": false
                      }
                    },
                    "greaterOrEquals": 2
                  },
                  {
                    "field": "Microsoft.Network/virtualNetworks/subnets[*].routeTable",
                    "exists": false
                  },
                  {
                    "not": {
                      "anyOf": [
                        {
                          "field": "Microsoft.Network/virtualNetworks/subnets[*].name",
                          "equals": "AzureBastionSubnet"
                        },
                        {
                          "field": "Microsoft.Network/virtualNetworks/subnets[*].name",
                          "equals": "GatewaySubnet"
                        }
                      ]
                    }
                  }
                ]
              }
            },
            "greater": 0
          }
        ]
      },
      "then": {
        "effect": "[parameters('effect')]",
        "details": {
          "type": "Microsoft.Network/azureFirewalls",
          "existenceCondition": {
            "count": {
              "field": "Microsoft.Network/azureFirewalls/ipConfigurations[*]",
              "where": {
                "field": "Microsoft.Network/azureFirewalls/ipConfigurations[*].subnet.id",
                "like": "[concat('/subscriptions/', subscription().subscriptionId, '/resourceGroups/*/providers/Microsoft.Network/virtualNetworks/', first(split(field('fullName'), '/')), '/subnets/AzureFirewallSubnet')]"
              }
            },
            "equals": 1
          }
        }
      }
    },
    "versions": [
      "3.0.0-PREVIEW"
    ]
  },
  "id": "/providers/Microsoft.Authorization/policyDefinitions/9df61aa2-b10c-4efe-aae0-295cc936930b",
  "name": "9df61aa2-b10c-4efe-aae0-295cc936930b"
}