CISA and Australia’s Cyber Security Centre released joint guidance telling critical infrastructure operators how to isolate vital operational technology and supporting systems during a cyberattack or other disruption so essential services can keep running. The CI Fortify guidance covers identifying vital OT and dependencies, mapping network connections, building physical and logical isolation points, planning graduated isolation steps, and managing risks during isolation such as delayed patching, reduced external visibility, and removable-media infection.
Why it matters: This matters to utilities and other critical infrastructure operators because it gives practical response planning steps for keeping essential systems running when corporate or connected networks are compromised. Organizations that run OT should review their segmentation, remote access, manual fallback processes, and isolation playbooks now rather than during an active incident.
Ionut Arghire
2026.07.29
100% relevant
This article is the initial report of a new joint CISA-ACSC guidance release focused specifically on OT isolation planning for critical infrastructure.
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