Network segmentation for PCI scoped systems
Overview
PCI DSS expects CDE isolation from corporate LAN—VLAN alone is insufficient without inspection.
Layers
Firewalls between segments; deny default; log allowed flows; jump box for admin.
Scoping workshop
Reduce scope shrinking SAQ complexity—sometimes outsource card processing entirely.
Evidence
Quarterly firewall rule review tickets; ASV scan scheduling.
Common gap
Flat Wi-Fi guest bridging staff SSIDs—segment physically or logically.
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