Adam Pointon of Knocknoc describes the importance of reducing the attack surface of a system and how this applies to test systems. He shares how to keep ports and services invisible until users or services log in. This is an important security tactic to consider especially for older systems that cannot be updated to latest security standards. From the Test System Security Summit in May 2025.
See the presentation here: Deny by Default Firewall by Knocknoc - YouTube
