DENY-MgmtPortsFromInternetPolicyAssignment.json

{
    "$schema": "https://schema.management.azure.com/schemas/2019-08-01/tenantDeploymentTemplate.json#",
    "contentVersion": "1.0.0.0",
    "parameters": {
        "topLevelManagementGroupPrefix": {
            "type": "string",
            "metadata": {
                "description": "Provide the ESLZ company prefix to the intermediate root management group containing the policy definitions."
            }
        },
        "enforcementMode": {
            "type": "string",
            "allowedValues": [
                "Default",
                "DoNotEnforce"
            ],
            "defaultValue": "Default"
        },
        "nonComplianceMessagePlaceholder": {
            "type": "string",
            "defaultValue": "{enforcementMode}"
        }
    },
    "variables": {
        "policyDefinitions": {
            "denyMgmt": "[concat('/providers/Microsoft.Management/managementGroups/', parameters('topLevelManagementGroupPrefix'), '/providers/Microsoft.Authorization/policyDefinitions/Deny-MgmtPorts-From-Internet')]"
            },
        "policyAssignmentNames": {
            "denyMgmt": "Deny-MgmtPorts-Internet",
            "description": "This policy denies any network security rule that allows management port access from the Internet",
            "displayName": "Management port access from the Internet should be blocked"
        },
        "nonComplianceMessage": {
            "message": "Management port access from the Internet {enforcementMode} be blocked.",
            "Default": "must",
            "DoNotEnforce": "should"
        }
    },
    "resources": [
        {
            "type": "Microsoft.Authorization/policyAssignments",
            "apiVersion": "2022-06-01",
            "name": "[variables('policyAssignmentNames').denyMgmt]",
            "properties": {
                "description": "[variables('policyAssignmentNames').description]",
                "displayName": "[variables('policyAssignmentNames').displayName]",
                "policyDefinitionId": "[variables('policyDefinitions').denyMgmt]",
                "enforcementMode": "[parameters('enforcementMode')]",
                "nonComplianceMessages": [
                    {
                        "message": "[replace(variables('nonComplianceMessage').message, parameters('nonComplianceMessagePlaceholder'), variables('nonComplianceMessage')[parameters('enforcementMode')])]"
                    }
                ]
            }
        }
    ],
    "outputs": {}
}