The Cybersecurity and Infrastructure Security Agency (CISA), Australian Signals Directorate (ASD), United Kingdom’s National Cyber Security Centre (NCSC-UK), and Canadian Centre for Cyber Security (CCCS) published ‘CI Fortify – Advice for Isolating Vital Systems.’ This joint guidance helps critical infrastructure operators protect essential services from cyber threats and ensure continuity during incidents or crises. State-sponsored actors often target infrastructure for espionage or disruption, prompting operators to isolate operational technology systems during emergencies. CISA emphasizes the importance of robust isolation and recovery plans to maintain services under degraded conditions. The guidance includes steps like identifying vital systems, establishing separation points, and testing isolation strategies. It also provides real-world examples of resilience during ransomware attacks. For more details, visit cisa.gov/ci-fortify.
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