rules:
- id: gcp-compute-ip-forward
  patterns:
  - pattern: resource
  - pattern-inside: |
      resource "google_compute_instance" "..." {
      ...
      can_ip_forward = true
      ...
      }
  message: >-
    Ensure that IP forwarding is not enabled on Instances. This lets the instance act as a traffic router
    and
    receive traffic not intended for it, which may route traffic through unintended passages.	
  metadata:
    owasp:
    - A05:2017 - Broken Access Control
    - A01:2021 - Broken Access Control
    cwe:
    - 'CWE-284: Improper Access Control'
    category: security
    technology:
    - terraform
    - gcp
    references:
    - https://docs.bridgecrew.io/docs/google-cloud-policy-index
    subcategory:
    - audit
    likelihood: LOW
    impact: LOW
    confidence: LOW
  languages: [hcl]
  severity: INFO