Enforce Cloudsql Tls Vpc Service Controls

What the solution is

This solution combines database-level transport security enforcement with network isolation and context-aware perimeter boundaries. By configuring the Cloud SQL instance with ssl_mode set to ENCRYPTED_ONLY, utilizing Private Services Access (PSA) for internal routing, and establishing a VPC Service Controls (VPC SC) service perimeter, data movement is protected at the transport, network, and organizational layers.

How it meets the requirements

• Enforcing TLS Encryption: Setting the database instance SSL mode to ENCRYPTED_ONLY guarantees that all incoming connections must use SSL/TLS encryption. Any connection attempt over cleartext or unencrypted TCP is rejected at the database listener level.
• Restricting to Private Data Flows: Utilizing Private Services Access ensures that database traffic remains entirely within Google Cloud's private network using private IP addresses without exposure to the public internet.
• Preventing Data Exfiltration: Enclosing the database project within a VPC Service Controls perimeter creates a secure boundary that mitigates unauthorized copying or transferring of data from managed services to external, unapproved environments.

Key advantages and capabilities

• Strict Transport Security: Guarantees end-to-end cryptographic protection for all data in transit across database sessions.
• Defense-in-Depth: Integrates perimeter boundaries (VPC SC), network isolation (Private IP), and cryptographic enforcement (ENCRYPTED_ONLY).
• Zero Public Exposure: Eliminates internet-facing endpoints for critical transactional database instances.
• Native Governance: Standardizes data egress policies through centralized Google Cloud security perimeters.

Why this is optimal

This approach directly satisfies all regulatory mandates without relying on client-side discretion or exposing services to public endpoints. It ensures that traffic cannot traverse unencrypted channels, cannot be routed over the public internet, and cannot be exfiltrated outside the managed perimeter boundary.