When you select the Pre-Shared Secret check box in the IKE Properties window:

A.
The firewall can authenticate itself by a public-key signature.

B.
The firewall can authenticate itself using SecuRemote only.

C.
The firewall can authenticate itself by a pre-shared secret.

D.
The firewall can authenticate itself using all standard and non-standard IKE authentication
methods.

E.
The firewall can authenticate itself using a modified pre-shared secret key.

Explanation:

: That’s true, Pre-Shared Secret is used when both ends of the VPN lacks access to a compatible
certificate server. Once you have defined all the endpoints in your VPN, you can establish a
password that is used to authenticate the other end of the connection. (Both ends of the
connection must be configured with the same password). See page 323 of “Essential Checkpoint
Firewall 1″ Book.