Episode 41 — Deperimeterize Safely: SASE, SD-WAN, Software-Defined Networking, and Segmentation
This episode explains how to “deperimeterize” safely by replacing the idea of a single trusted internal network with identity-driven access and segmented pathways, because SecurityX often tests whether you can modernize connectivity without widening the blast radius. You’ll define SASE and how it combines networking and security services, then connect that model to SD-WAN decisions that optimize traffic paths while still enforcing policy consistently across branch, remote, and cloud destinations. Software-defined networking is covered as a segmentation enabler, showing how intent-based policy and microsegmentation can reduce lateral movement when endpoint compromise is assumed, not hypothetical. You’ll also learn how to avoid common migration traps, such as moving traffic to new overlay paths without equivalent logging, misapplying trust to private links, or collapsing segmentation in the name of simplicity. Troubleshooting examples include inconsistent policy enforcement between edge and cloud controls, identity context not being available for decisions, and legacy applications that break when segmentation is tightened, forcing you to design compensating controls. By the end, you should be able to answer exam scenarios by reasoning from trust boundaries, enforcement points, and visibility, rather than treating “SASE” as a product label. 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.