| Plugin Title | Open DNS |
| Cloud | |
| Category | VPC Network |
| Description | Determine if TCP or UDP port 53 for DNS is open to the public |
| More Info | While some ports such as HTTP and HTTPS are required to be open to the public to function properly, more sensitive services such as DNS should be restricted to known IP addresses. |
| GOOGLE Link | https://cloud.google.com/vpc/docs/using-firewalls |
| Recommended Action | Restrict TCP and UDP port 53 to known IP addresses |