Fortinet fortigate-200a Betriebsanweisung

Authentication timeout controls how long an authenticated firewall connection can be 
idle before the user must authenticate again.

Go to System > Config > Options.

In Auth Timeout, type a number, in minutes.
The default authentication timeout is 15 minutes.

Go to User > Local to add local user names and configure authentication.

Add a new local username.

The local user name.

The authentication type to use for this user.
The Delete and Edit icons.

Enter the user name.

Select Disable to prevent this user from authenticating.

Select Password to require the user to authenticate using a password. Enter 

the password that this user must use to authenticate. The password should 

be at least six characters long.