Deny-RDP-From-Internet.json

{
  "name": "Deny-RDP-From-Internet",
  "type": "Microsoft.Authorization/policyDefinitions",
  "apiVersion": "2021-06-01",
  "scope": null,
  "properties": {
    "policyType": "Custom",
    "mode": "All",
    "displayName": "[Deprecated] RDP access from the Internet should be blocked",
    "description": "This policy denies any network security rule that allows RDP access from Internet. This policy is superseded by https://www.azadvertizer.net/azpolicyadvertizer/Deny-MgmtPorts-From-Internet.html",
    "metadata": {
      "deprecated": true,
      "supersededBy": "Deny-MgmtPorts-From-Internet",
      "version": "1.0.1-deprecated",
      "category": "Network",
      "source": "https://github.com/Azure/Enterprise-Scale/",
      "alzCloudEnvironments": [
        "AzureCloud",
        "AzureChinaCloud",
        "AzureUSGovernment"
      ]
    },
    "parameters": {
      "effect": {
        "type": "String",
        "metadata": {
          "displayName": "Effect",
          "description": "Enable or disable the execution of the policy"
        },
        "allowedValues": [
          "Audit",
          "Deny",
          "Disabled"
        ],
        "defaultValue": "Deny"
      }
    },
    "policyRule": {
      "if": {
        "allOf": [
          {
            "field": "type",
            "equals": "Microsoft.Network/networkSecurityGroups/securityRules"
          },
          {
            "allOf": [
              {
                "field": "Microsoft.Network/networkSecurityGroups/securityRules/access",
                "equals": "Allow"
              },
              {
                "field": "Microsoft.Network/networkSecurityGroups/securityRules/direction",
                "equals": "Inbound"
              },
              {
                "anyOf": [
                  {
                    "field": "Microsoft.Network/networkSecurityGroups/securityRules/destinationPortRange",
                    "equals": "*"
                  },
                  {
                    "field": "Microsoft.Network/networkSecurityGroups/securityRules/destinationPortRange",
                    "equals": "3389"
                  },
                  {
                    "value": "[[if(and(not(empty(field('Microsoft.Network/networkSecurityGroups/securityRules/destinationPortRange'))), contains(field('Microsoft.Network/networkSecurityGroups/securityRules/destinationPortRange'),'-')), and(lessOrEquals(int(first(split(field('Microsoft.Network/networkSecurityGroups/securityRules/destinationPortRange'), '-'))),3389),greaterOrEquals(int(last(split(field('Microsoft.Network/networkSecurityGroups/securityRules/destinationPortRange'), '-'))),3389)), 'false')]",
                    "equals": "true"
                  },
                  {
                    "count": {
                      "field": "Microsoft.Network/networkSecurityGroups/securityRules/destinationPortRanges[*]",
                      "where": {
                        "value": "[[if(and(not(empty(first(field('Microsoft.Network/networkSecurityGroups/securityRules/destinationPortRanges[*]')))), contains(first(field('Microsoft.Network/networkSecurityGroups/securityRules/destinationPortRanges[*]')),'-')), and(lessOrEquals(int(first(split(first(field('Microsoft.Network/networkSecurityGroups/securityRules/destinationPortRanges[*]')), '-'))),3389),greaterOrEquals(int(last(split(first(field('Microsoft.Network/networkSecurityGroups/securityRules/destinationPortRanges[*]')), '-'))),3389)) , 'false')]",
                        "equals": "true"
                      }
                    },
                    "greater": 0
                  },
                  {
                    "not": {
                      "field": "Microsoft.Network/networkSecurityGroups/securityRules/destinationPortRanges[*]",
                      "notEquals": "*"
                    }
                  },
                  {
                    "not": {
                      "field": "Microsoft.Network/networkSecurityGroups/securityRules/destinationPortRanges[*]",
                      "notEquals": "3389"
                    }
                  }
                ]
              },
              {
                "anyOf": [
                  {
                    "field": "Microsoft.Network/networkSecurityGroups/securityRules/sourceAddressPrefix",
                    "equals": "*"
                  },
                  {
                    "field": "Microsoft.Network/networkSecurityGroups/securityRules/sourceAddressPrefix",
                    "equals": "Internet"
                  },
                  {
                    "not": {
                      "field": "Microsoft.Network/networkSecurityGroups/securityRules/sourceAddressPrefixes[*]",
                      "notEquals": "*"
                    }
                  },
                  {
                    "not": {
                      "field": "Microsoft.Network/networkSecurityGroups/securityRules/sourceAddressPrefixes[*]",
                      "notEquals": "Internet"
                    }
                  }
                ]
              }
            ]
          }
        ]
      },
      "then": {
        "effect": "[[parameters('effect')]"
      }
    }
  }
}