The U.S. and Australian governments have released new guidance urging critical infrastructure organizations to prepare to isolate vital operational technology systems in the event of a cyberattack or other major disruptions. The guidance, titled "CI Fortify – Advice for isolating vital systems," was developed by the U.S. Cybersecurity and Infrastructure Security Agency (CISA), the Australian Signals Directorate's Australian Cyber Security Centre (ACSC), the FBI, and international partners. It provides recommendations for disconnecting critical operational technology (OT) and associated systems from corporate, Internet-facing, and other less-trusted networks while continuing to provide essential services for an extended period. Operational technology includes the hardware and software used…