Hi all
i’m kinda new to RouterOS, I have had the interfaces configured and running fine. but sometimes i notice unusual issues with some ips. since i’m on dhcp, i’d like to the rule i will use to block users based on mac address from accessing the internet.
Any help 
The easiest way to accomplish it,
http://wiki.mikrotik.com/wiki/How_to_secure_a_network_using_ARP
Also you can add the MAC address in your IP > Firewall > Filter rule
From the advance tab paste the MAC address of the user where action is for allow his connection or drop this connection.
Rafiq…
http://forum.linux.org.bd