PCI DSS 1.5.1: Securing Computing Devices That Connect to the CDE
Any device bridging untrusted networks and your cardholder data environment (CDE) represents a critical attack vector. PCI DSS 1.5.1 requires you to implement comprehensive security controls on these hybrid-connected systems to prevent compromise. Without proper device hardening, attackers can pivot from public networks directly into sensitive payment infrastructure.
What this means
This control addresses the risk of computing devices that simultaneously connect to both untrusted external networks (like the internet) and your protected CDE. These devices—whether servers, workstations, or network appliances—need security measures that prevent malware, unauthorized access, or configuration drift from compromising either network. The control ensures that devices serving as bridges between trusted and untrusted zones don't become weak entry points.
How to comply
- 1.Identify all computing devices with dual connections to untrusted networks and the CDE
- 2.Implement host-based firewalls with strict inbound/outbound rules on each device
- 3.Deploy anti-malware and endpoint detection tools with active monitoring
- 4.Apply security baselines and harden operating systems according to PCI standards
- 5.Enable logging and audit trails for all network connections and security events
- 6.Restrict administrative access using multi-factor authentication and role-based controls
- 7.Patch and update all software regularly, with a documented patch management process
- 8.Disable unnecessary services and ports not required for business function
Evidence auditors look for
- Firewall rule documentation showing inbound/outbound policies per device
- Endpoint security console logs demonstrating active malware protection
- OS hardening checklists and security baseline configurations
- Network segmentation diagrams identifying dual-connected devices
- System access logs with MFA authentication records
- Patch management reports showing timely security updates
- Device inventory with security control assignments
- Security event logs from host IDS/IPS tools
Frequently asked questions
When will FAQs be available?
The FAQ for this control is currently being prepared.
GRCWatch automatically discovers all dual-connected devices in your infrastructure, maps them to PCI DSS 1.5.1 requirements, and provides continuous compliance monitoring for security control changes—eliminating manual device inventories and audit cycles.
See how GRCWatch handles this control automatically
Start free trial