GCP VPC Service Controls Perimeter Builder

About This Tool

The GCP VPC Service Controls Perimeter Builder helps you define service perimeters that restrict data movement between Google Cloud services and the internet. VPC Service Controls create a security boundary around GCP resources to prevent data exfiltration even if IAM policies are misconfigured. This tool guides you through configuring protected services, access levels, ingress and egress rules, and perimeter bridges, generating the configuration for deployment via gcloud or Terraform.

When to Use This Tool

• •Build service perimeters that prevent BigQuery, Cloud Storage, and other data services from being accessed outside your organization.
• •Configure access levels that allow specific IP ranges, device trust levels, or identity attributes to reach protected services.
• •Design ingress and egress rules for controlled data sharing between your organization and trusted partners or projects.
• •Plan perimeter configurations for multi-project architectures that need controlled data flow between different security zones.

Frequently Asked Questions

What is the difference between VPC Service Controls and VPC firewalls?

VPC firewalls control network-level (IP/port) traffic between VM instances. VPC Service Controls operate at the Google API layer, restricting which projects and identities can access specific Google Cloud services. They protect against data exfiltration via API calls even when network connectivity is allowed.

What happens when a request violates a service perimeter?

The request is denied with a VPC Service Controls violation error. The violation is logged in Cloud Audit Logs with details about the denied request. You can use dry-run mode to test perimeter configurations by logging violations without actually blocking requests.