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Crossfoot / Controls / Network security and segmentation
Draft v0.1.05 of 6 frameworks

Network security and segmentation

Firewalls and network security controls restrict traffic; sensitive environments are segmented from untrusted networks.

Where it appears

SOC 2
CC6.6Implements logical access security measures against threats from outside system boundaries
PCI DSS 4.0
1.2Network security controls are configured and maintained
1.3Network access to and from the cardholder data environment is restricted
1.4Network connections between trusted and untrusted networks are controlled
NIST CSF 2.0
PR.IR-01Networks and environments are protected from unauthorized logical access and usage
ISO 27001:2022
A.8.20Networks security
A.8.21Security of network services
A.8.22Segregation of networks
HIPAA Security Rule
no direct requirement
NIST 800-53 r5
SC-7Boundary protection
AC-4Information flow enforcement

No direct HIPAA Security Rule citation; network safeguards are expected to come out of the risk analysis.

Evidence auditors usually ask for

A typical starting list. Your assessor's request list is the one that counts.

  • Network diagram and data-flow diagram, reviewed within the last 12 months
  • Firewall / security-group rule sets with business justification for each rule
  • Evidence of periodic firewall rule review
  • Segmentation evidence for sensitive environments (and segmentation testing where required)

Crosswalks that include this