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#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
#      http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
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# yaml-language-server: $schema=../../../../schemas/custom-constraint.schema.json

custom.firewallRestrictRdpPolicyRule:
  action_type: DENY
  condition: |-
    resource.rules.exists(rule,
        rule.priority < 2147483644 &&
        rule.direction == 'INGRESS' &&
        !rule.match.srcIpRanges.all(ipRange,
            ipRange == '35.235.240.0/20' ||
            ipRange.startsWith('192.168.') ||
            ipRange.matches('^172\\.(?:1[6-9]|2\\d|3[0-1]).*') ||
            ipRange.startsWith('10.')
        ) &&
        rule.match.layer4Configs.all(l4config,
            l4config.ipProtocol == 'tcp' &&
            l4config.ports.all(port, port == '3389')
        )
    )
  description: Ensure that RDP access is restricted from any source when using Firewall
    Policy Rule
  display_name: Restrict Firewall Policy rules allowing RDP access from any source
  method_types:
  - CREATE
  - UPDATE
  resource_types:
  - compute.googleapis.com/FirewallPolicy
