Episode 70 — Engineer Compartmentalization and Criticality: Limiting Blast Radius Without Breaking Control

This episode teaches how to engineer compartmentalization in OT so you can limit blast radius while still preserving the control behaviors operations depend on, a balancing act that shows up repeatedly in design and response questions. You’ll learn how to use criticality to decide what belongs in separate zones, what needs tightly controlled conduits, and what systems should never share credentials or management planes because a compromise would spread too easily. We connect compartmentalization to practical patterns like cell and area zoning, dedicated jump hosts per zone, strict one-way data paths where appropriate, and carefully governed remote access that can be disabled without stranding recovery. The episode emphasizes that compartmentalization is not simply “more firewalls,” because poorly designed segmentation can break deterministic traffic, create troubleshooting chaos, and lead teams to implement unsafe workarounds. You’ll practice evaluating a scenario for where the true boundary should be, how to validate that segmentation supports operations, and how to document the design so it is maintainable and auditable over time. Produced by BareMetalCyber.com, where you’ll find more cyber audio courses, books, and information to strengthen your educational path. Also, if you want to stay up to date with the latest news, visit DailyCyber.News for a newsletter you can use, and a daily podcast you can commute with.