ValidateCardholderDataEnvironment(CDE)isolationandmeetPCIDSSRequirement11.4.5withexpertsegmentationtesting.
What Is PCI Segmentation Testing?
PCI segmentation testing validates that network segmentation controls isolating your Cardholder Data Environment (CDE) from out-of-scope systems (non-CDE environments) are functioning as intended and effectively enforced. Required by PCI DSS Requirement 11.4.5, this assessment verifies that segmentation mechanisms — firewalls, VLANs, ACLs, and other controls — effectively prevent unauthorized traffic from reaching systems that store, process, or transmit cardholder data. Passing segmentation validation reduces the scope of your PCI DSS compliance audit and demonstrates strong data protection practices.
Why Do You Need It?
Without validated segmentation, your entire network may be considered fully in scope for PCI DSS compliance — dramatically increasing audit cost, complexity, and remediation effort. PCI segmentation testing is mandatory for any organization that uses network segmentation to reduce PCI scope. Merchants must perform this test annually, while service providers are required to validate segmentation every six months. Failure to comply can result in fines, increased transaction fees, and loss of payment processing privileges and compliance status.
What We Assess
Our PCI segmentation validation covers all network segmentation boundaries between the CDE and out-of-scope environments.
Our Methodology
PCI segmentation testing is not about finding random vulnerabilities — it is a targeted security validation that your cardholder data environment is truly isolated from everything else. We test from every out-of-scope network segment, in the way PCI DSS Requirement 11.4.5 expects, and provide a report your QSA can accept as-is.
security testing
Testing Lifecycle
Every PCI segmentation engagement follows a standardized and predictable process — defining the CDE and its boundaries, comparing your network diagram to reality, probing each boundary from the outside, marking each one pass or fail with evidence, and delivering a PCI-ready report plus a free retest for anything that failed.