US, Australia Release OT Isolation Guidance for Critical Infrastructure

The guidance details steps organizations can take to isolate vital OT and supporting systems, and operate in isolation for an extended period. The post US, Australia Release OT Isolation Guidance for Critical Infrastructure appeared first on SecurityWeek .

The article reports that CISA and Australia’s ACSC jointly released "CI Fortify – Advice for isolating vital systems," guidance for critical infrastructure operators on how to isolate essential OT and supporting systems and operate them in isolation for extended periods during disruptions or crises.[1][3] The guidance emphasizes identifying and classifying vital OT assets, documenting all connections to IT, vendor, cloud, and peer networks, and establishing physical and logical separation and isolation points to reduce attack pathways and maintain service continuity.[1][3][4] From a RealGround perspective, these OT isolation and segmentation practices directly impact the broader digital and AI supply chain, since many critical infrastructure environments increasingly depend on AI-driven monitoring, control, and analytics running across OT/IT and third-party platforms. Organizations should treat AI components (e.g., ML-based anomaly detection in ICS, cloud-hosted AI services used for operations) as part of the critical dependency map, ensure their connectivity can be isolated or degraded safely, and incorporate AI systems into isolation playbooks, SBOM-style inventories, and red-tea