azure-policy/built-in-policies/policyDefinitions/Security Center/ASC_NetworkSecurityGroupsOnSubnets_Audit.json at master · Azure/azure-policy · GitHub

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{
  "properties": {
    "displayName": "Subnets should be associated with a Network Security Group",
    "policyType": "BuiltIn",
    "mode": "All",
    "description": "Protect your subnet from potential threats by restricting access to it with a Network Security Group (NSG). NSGs contain a list of Access Control List (ACL) rules that allow or deny network traffic to your subnet.",
    "metadata": {
      "version": "3.0.0",
      "category": "Security Center"
    },
    "version": "3.0.0",
    "parameters": {
      "effect": {
        "type": "string",
        "defaultValue": "AuditIfNotExists",
        "allowedValues": [
          "AuditIfNotExists",
          "Disabled"
        ],
        "metadata": {
          "displayName": "Effect",
          "description": "Enable or disable the execution of the policy"
        }
      }
    },
    "policyRule": {
      "if": {
        "field": "type",
        "equals": "Microsoft.Network/virtualNetworks/subnets"
      },
      "then": {
        "effect": "[parameters('effect')]",
        "details": {
          "type": "Microsoft.Security/assessments",
          "name": "eade5b56-eefd-444f-95c8-23f29e5d93cb",
          "existenceCondition": {
            "field": "Microsoft.Security/assessments/status.code",
            "in": [
              "NotApplicable",
              "Healthy"
            ]
          }
        }
      }
    },
    "versions": [
      "3.0.0"
    ]
  },
  "id": "/providers/Microsoft.Authorization/policyDefinitions/e71308d3-144b-4262-b144-efdc3cc90517",
  "name": "e71308d3-144b-4262-b144-efdc3cc90517"
}