On the end user side, if FortiClient has not been registered with the FortiGate unit, it is continually listening for the FortiGate discovery message. When this message is detected the un-registered client will pop-up a FortiGate Detected message. The user can choose to either register or ignore the message.

Clients that have registered with that FortiGate unit will not be listening for these messages and will not display the message again.

If you enabled the registration key, the user is prompted to enter the key before a connection can be completed.

For more information on FortiGate registration, see the FortiClient Administration Guide.