4e789480_Using_RADIUS_Authentication__In_this_field
[Do this] Configure the primary and secondary RADIUS servers. By default, the UTM-1 appliance sends a request to the primary RADIUS server first. If the primary RADIUS server does not respond after three attempts, the UTM-1 appliance will send the request to the secondary RADIUS server. [In this field] 
Primary/Secondary RADIUS Server
Using RADIUS Authentication
In this field