CISA Industrial Control Systems (ICS) Security Guidance
CISA ICS: Defense-in-Depth Recommended Practice

CISA Industrial Control Systems (ICS) Security Guidance CISA-ICS-DID-25: Security Architecture (Perimeter, Firewalls, Diodes, Access)

Implement layered security architecture: perimeter security, firewalls between zones, unidirectional gateways/diodes where appropriate, access and authentication controls, and restrictions on bring-your-own-device.

Maintained by Gerard BlokdykVerified against the published standard Control text last updated

What else in your programme already covers this

This control maps to 3 controls across 2 other frameworks. If you already hold one of them, the evidence you collected for it is the starting point here rather than new work.

NIST SP 800-53 Rev 5 · 2 controls

NIST Cybersecurity Framework 2.0 · 1 control

  • NIST-CSF-PR.IR-01 Networks and environments are protected from unauthorized logical access and usage

Every mapping shown was judged rather than inferred from wording similarity, and the ones that failed review are published too. See the coverage reports and what was rejected.

Other controls in CISA ICS: Defense-in-Depth Recommended Practice

Query this from an agent

The graph holds this control, the 3 it maps to, and the evidence behind each claim, over MCP and REST.

MCP endpointAll CISA Industrial Control Systems (ICS) Security Guidance controls