Episode 53 — Conduct Architecture Reviews for OT Risk: Data Flows, Trust Boundaries, and Weak Links

This episode teaches how to conduct architecture reviews for OT risk by focusing on data flows, trust boundaries, and weak links that create real-world compromise paths, which aligns closely with SecOT+ objectives around segmentation and defensible design. You’ll learn how to map functional flows such as control commands, telemetry, historian feeds, engineering changes, and remote support sessions, then identify where trust is assumed rather than explicitly enforced. We cover common weak links like shared jump hosts, flat management networks, overly permissive firewall rules, dual-homed devices, unmanaged wireless bridges, and identity dependencies that quietly connect OT to upstream IT services. The episode also explains how architecture reviews should account for operational constraints, including determinism, maintenance windows, vendor support boundaries, and the need to preserve safety functions even during containment actions. You’ll practice translating review findings into actionable recommendations that include ownership, evidence, and rollback planning, so architecture work leads to safer systems rather than diagrams that never change anything. By the end, you’ll be able to interpret exam scenarios that describe “a simple integration” and correctly spot the trust boundary that makes it risky. 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.