Whitelist

A whitelist is a list of approved entities, devices, or users permitted to access a specific system, application, or network. It functions as a security measure by explicitly allowing only those on the list to gain entry, while denying all others. Think of it like a VIP guest list for an event—only invited or authorized individuals are granted access. This approach helps organizations control who can connect to or interact with their resources, reducing the risk of unauthorized access or malicious activity.