is it possible to give the DHCP Server a MAC address Table So when he see a new NIC asking for IP it compare its MAC address with Mac Containing in Safe list ! to decide then if he will allow the NIC to get ip a go over the internet !
You could setup something like this using the src. MAC Address option under the filter rules.
an example.
/ip firewall filter
add action=accept chain=input comment=“User 1” disabled=no in-interface=LAN src-mac-address=00:0C:42:0C:7A:6E
add action=accept chain=input comment=“User 2” disabled=no in-interface=LAN src-mac-address=00:06:F4:0E:72:5F
add action=log chain=input comment=“log people not allowed” disabled=no in-interface=LAN log-prefix=“”
add action=drop chain=input comment=“drop people not allowed” disabled=no in-interface=LAN
One option you may want to do is to NOT add any pool to the DHCP server. This way you will have to add a MAC address and make a static lease before it will respond to a MAC’s DHCP Discover.