Authentication, Authorization, and Accounting
Security is supported and enforced by authentication, authorization, and accounting (AAA), a framework for controlling access to computer and network resources, enforcing policies, and more.
Authentication is the process of verifying the digital identity of an entity—for example, an employee, a customer, a server, an application, a website, a smart meter, a mobile phone, or a security guard. Authentication is also commonly called logging on.
Authentication can take place at the firewall or be passed through the firewall to take place beyond the firewall. Authentication at the firewall takes place when the allow/deny decision is dependent upon the identity of the host or user. Authentication beyond ...
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