Which protocol is commonly used for FortiGate's web management interface?

The commonly used protocol for FortiGate's web management interface is HTTPS. HTTPS, or Hypertext Transfer Protocol Secure, ensures that the communication between the user's web browser and the FortiGate device is encrypted. This is critical for protecting sensitive data such as usernames and passwords during management sessions, as it prevents unauthorized users from intercepting and reading the traffic.

Using HTTPS enhances security by incorporating SSL/TLS protocols, which provide a secure channel over an insecure network, safeguarding the integrity and confidentiality of the information exchanged. This makes it especially important in network security appliances like FortiGate, where secure management practices are paramount.

Other protocols like HTTP are not secure because they transmit data unencrypted, making them vulnerable to eavesdropping and attacks. Similarly, FTP is a file transfer protocol that is not designed for web management purposes, and SSH, although secure, is primarily used for command line access rather than web-based management interfaces. Hence, HTTPS stands out as the appropriate and secure protocol for FortiGate's web management interface.