Episode 22 — OSINT: Domains, DNS, and Internet Exposure

This episode teaches you how domain and DNS information maps an organization’s external footprint and guides efficient testing decisions. You’ll learn how domains and subdomains often reflect environments, applications, and ownership boundaries, and how common DNS record types imply services and infrastructure choices without guaranteeing exposure. We’ll cover certificate and hosting clues, cloud-related patterns, and how redirects, error behavior, and headers add context to what is truly reachable. You’ll practice prioritizing findings by value and risk, distinguishing production from non-production assets, and documenting uncertainty clearly when information is inferred rather than confirmed. By the end, you’ll be able to translate internet-facing signals into a defensible list of validation targets while avoiding assumptions that lead to wasted effort or unsafe probing. 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.