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VPC Service Controls

PRJ-GCP-SEC-088

Data exfiltration prevention

~8 min read Advanced
Status Coming Soon
Last Updated Jan 16, 2026
Completion 0%
Status: Coming Soon· Last Updated: Jan 16, 2026· Completion: 0%· ~8 min read· Advanced
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Implementation Guide

Comprehensive step-by-step deployment guide

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Estimated Monthly Cost

~$42/mo on minimal config
ComputeStorageMonitoring
Business ContextUncontrolled data movement and potential exfiltration of sensitive information f…

The Problem

  • Uncontrolled data movement and potential exfiltration of sensitive information from GCP projects.
  • Exposure of critical data to public internet or untrusted networks, increasing attack surface.
  • Challenges in enforcing consistent data perimeter controls across diverse GCP services, leading to compliance gaps.

The Solution

  • Establishes a robust security perimeter using VPC Service Controls to isolate sensitive data and resources.
  • Enables secure and private access to Google APIs and services from within the perimeter via Private Google Access.
  • Protects web applications and services from DDoS attacks and common web vulnerabilities using Cloud Armor policies.

Business Value

  • Reduces the risk of data exfiltration by 95% within protected GCP projects.
  • Ensures 100% adherence to data residency and access control policies for sensitive workloads.
  • Decreases security incident response time by 70% through automated perimeter enforcement and alerting.
  • Avoids potential regulatory fines and reputational damage by maintaining a strong data security posture.

Risk Mitigation

  • Mitigates unauthorized access to sensitive data and resources within GCP.
  • Prevents accidental or malicious data exfiltration to external, untrusted environments.
  • Protects against internet-borne threats, including DDoS attacks and common web application exploits.
  • Ensures compliance with industry regulations and internal security policies related to data protection.
GRC MappingISO 27001:2022(A.5.18 Control of privileged access, A.8.10 Data leakage preventi…

Compliance Frameworks

  • ISO 27001:2022 (A.5.18 Control of privileged access, A.8.10 Data leakage prevention)
  • NIST Cybersecurity Framework v1.1 (PR.AC-4 Access Restrictions, PR.DS-2 Data-at-rest, PR.DS-5 Protections against data leakage)
  • SOC 2 Type 2 (Common Criteria CC6.1 Logical and Physical Access Controls, CC6.3 Network and Security Controls)
  • CIS Controls v8 (Control 4: Secure Configuration of Enterprise Assets and Software, Control 13: Data Protection)

Security Controls Implemented

  • VPC Service Controls perimeter enforcement for data ingress/egress restrictions.
  • Private Google Access to ensure all API traffic remains within the Google network, bypassing the public internet.
  • Cloud Armor WAF policies to filter malicious traffic and protect web-facing applications.
  • Identity and Access Management (IAM) policies integrated with VPC Service Controls for granular access control.
  • Audit logging configured for VPC Service Controls and Cloud Armor events to monitor policy violations.

Audit Evidence

  • VPC Service Controls perimeter configuration and access policy definitions.
  • Cloud Armor security policies and rulesets for web application protection.
  • Cloud Audit Logs demonstrating VPC Service Controls and Cloud Armor enforcement actions.
  • Network flow logs verifying traffic patterns within and across service perimeters.

Regulatory Alignment

  • GDPR (Article 32: Security of processing, Article 25: Data protection by design and by default)
  • HIPAA (45 CFR 164.312(a)(1): Technical Safeguards - Access Control, 45 CFR 164.306(a)(1): Security Standards - General Rules)
  • PCI DSS v4.0 (Requirement 1: Install and Maintain Network Security Controls, Requirement 6: Develop and Maintain Secure Systems and Software)
  • CCPA/CPRA (Section 1798.100: Consumer Rights - Right to Know, Section 1798.150: Data Breach Liability)

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Architecture Diagram

PRJ-GCP-SEC-088 Architecture

Technology Stack

VPC Service Controls
Private Google Access
Cloud Armor

Complete Documentation

Prerequisites

Project Owner or Editor role
gcloud CLI configured
Terraform >= 1.5 (optional)
GCP project with billing enabled
Service Account with required APIs
1

Clone & Authenticate

Clone the repository and authenticate with gcloud using your service account key or application default credentials.

gcloud auth application-default login
2

Enable Required APIs

Enable all required GCP APIs for this project in your target project.

gcloud services enable compute.googleapis.com container.googleapis.com
3

Initialize Infrastructure

Run Terraform init and plan to preview the GCP resource changes before applying.

terraform init && terraform plan -out=tfplan
4

Deploy Resources

Apply the Terraform plan to provision all GCP resources in your target project.

terraform apply tfplan
5

Verify & Monitor

Verify the deployment in the GCP Console and check Cloud Monitoring for any errors.

gcloud logging read "severity>=ERROR" --limit 50

Deployment Guide

Step-by-step instructions to deploy this project

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Architecture Diagram

Visual representation of the system architecture

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Source Code

Complete source code and configuration files

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Video Tutorial

Watch the complete walkthrough video

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