I'm not very familiar with firewalls. I have a "fortigate 90d". I must simply prohibit access to the internet (via wired network) to a group of about twenty pc. This ban must be made by mac address of PC. this rule must be turned on or off at any time. Who can help me please? I add a clarification: Current Running Firmware: FGT90D-5.00-build318.
I have followed this excellent tutorial http://cookbook.fortinet.com/mac-access-control/ but the web interface does not match the tutorial because based on newer firmware.