# Copyright 2025 Google LLC
#
# 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.firewallRestrictExplicitAllPortsPolicyRule:
  action_type: DENY
  condition: |-
    resource.rules.exists(rule,
      rule.action == 'allow' &&
      rule.priority < 2147483644 &&
      rule.direction == 'INGRESS' &&
      rule.match.layer4Configs.exists(l4,
        l4.ipProtocol in ['tcp', 'udp'] && (
          !has(l4.ports) ||
          '0-65535' in l4.ports ||
          '1-65535' in l4.ports
        )
      )
    )
  description: Prevent Firewall Policy rules that explicitly specify all TCP/UDP ports
    using ranges like 0-65535 or 1-65535
  display_name: Restrict Firewall Policy rules with explicit all-ports specifications
  method_types:
  - CREATE
  - UPDATE
  resource_types:
  - compute.googleapis.com/FirewallPolicy
