How does Fortinet define "Zero Trust Network Access"?

Fortinet defines "Zero Trust Network Access" as a security model that assumes no user or device is implicitly trusted, regardless of their location within or outside of the network perimeter. This concept is fundamental to Zero Trust architecture, where each access request is treated as if it originates from an open network, and trust must be established through strict verification processes.

This approach minimizes risks associated with insider threats, lateral movement within the network, and the exploitation of devices that may be compromised. By requiring continuous verification of both user identity and the health of the devices being used, organizations can implement a more robust security posture that responds dynamically to changing threat landscapes.

The other options do not accurately reflect the principles of Zero Trust. Trust based on user location could potentially introduce vulnerabilities by allowing access based on where a user is located, rather than their legitimacy. Granting access based solely on user authentication status does not consider the security postures of the devices or the context of the access request, which are critical in a Zero Trust model. Lastly, firewall rules that allow access automatically could create excessive trust assumptions, undermining the fundamental idea of Zero Trust.