I need help in setting up my network, currently I have the following setup.

[![enter image description here](https://i.stack.imgur.com/q9OZz.jpg)](https://i.stack.imgur.com/q9OZz.jpg)

All the computers can browse the internet but when I tried to create a two groups (a group that can access the internet and a group that can't access the internet) using Device MAC Access Control but to no avail still all the computers can access the internet. I follow the instructions in the Fortigate Cookbook (FORTI OS 5.4), Fortigate seems cannot recognize/identify MAC Addreses of the computers int the network