A: For a stronger authentication, you can also enable extended authentication (XAuth) to request the remote peer to provide a username and password.
B: FortiGate supports pre-shared key and signature as authentication methods.
A: XAuth provides an additional layer of authentication by requiring the remote peer to provide a username and password in addition to the pre-shared key or certificate. This enhances security.
B: FortiGate supports both pre-shared key and signature (using certificates) as authentication methods for IPsec VPN connections, offering flexibility based on security requirements.
C: Enabling XAuth does not necessarily result in faster authentication because additional packets are exchanged to complete the XAuth process.
D: When using the signature as the authentication method, a certificate is required on the remote peer for authentication, ensuring secure communication.
To authenticate each other, the peers use two methods: pre-shared key or digital signature. You can also enable an additional authentication method, XAuth, to enhance authentication.