Episode 73 — Apply Physical Security in OT: Badges, Readers, Biometrics, and Turnstiles

This episode explains physical security controls as part of OT security posture, because physical access frequently equals control access when cabinets, ports, and engineering environments are reachable. You’ll learn how badges, readers, biometrics, and turnstiles function as layers that enforce identity, authorization, and accountability at the facility boundary, and why “everyone knows everyone” is not a control. We connect these mechanisms to OT risk by showing how unauthorized entry can enable laptop connections, removable media introduction, serial access, or direct manipulation of equipment, often with little digital trace if physical controls are weak. You’ll also learn best practices for role-based access, visitor management, escort requirements, and time-based permissions, emphasizing that physical security must match operational rhythms like shift changes and maintenance windows. Troubleshooting considerations cover how physical controls fail in practice, such as tailgating, shared badges, bypassed doors, or reader outages that lead to propped-open entries, and how to respond with policy reinforcement, monitoring, and compensating controls that do not block safe operations. 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.