How is multi-factor authentication implemented with Firebox?

Multi-factor authentication (MFA) with Firebox is effectively implemented by integrating with external services like RADIUS. This integration allows Firebox to enhance security by requiring users to present more than one form of identification when accessing the network. The use of RADIUS as an external service facilitates the combination of something the user knows (like a password) with something the user possesses (such as a mobile device for receiving a one-time token or an authentication app).

This approach adds a significant layer of security beyond what is provided by local passwords alone, as it mitigates risks associated with unauthorized access that can arise from compromised credentials. With MFA integrated through RADIUS, administrators can enforce more stringent access control policies, ensuring that only authenticated and authorized users can connect to the Firebox and, by extension, the network resources it protects.

In contrast to the other options, relying solely on local passwords does not provide the additional security benefits that MFA aims to achieve. Restricting access based on IP addresses may enhance security in some contexts, but it does not authenticate users and can be bypassed, while requiring just a single PIN code does not meet the standards of multi-factor authentication, as it does not combine different forms of verification.