PCI-DSS Compliance: Validating Network Segmentation Boundaries
PCI-DSS Compliance: Validating CDE Segmentation
Under the PCI-DSS (Payment Card Industry Data Security Standard), any server that stores, processes, or transmits credit card data resides inside the Cardholder Data Environment (CDE).
The Role of Network Segmentation
While segmentation is not a strict requirement, it is highly recommended. By isolating the CDE using firewalls or VPCs, you restrict the scope of PCI audits, reducing compliance costs.
If segmentation is bypassed, the entire corporate network falls under PCI audits, complicating certification.
Verification Procedures
- Perform Segmentation Verification Scans: Annually, execute network port scans (Nmap) from non-CDE namespaces to verify that payment gateways are unreachable:
nmap -p 443 10.0.1.50 # Target CDE Server IP
Ensure responses return "filtered" or "closed." 2. Implement Zero-Trust Access Policies: Restrict network traffic strictly to pre-defined paths using firewalls and VPC endpoints.
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Need independent third-party verification for PCI-DSS compliance or customer security audits? Explore our FinTech VAPT & Payment API Security and Network Penetration Testing services, or schedule a free 30-minute scoping review.
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