The easiest way to achieve Wireless MAC address filtering is to use the controls in FreshTomato's wireless filter menu. There are cases, however, when you need/prefer to block MAC addresses in a script. This can be for easier management of such tasks (with large number of devices). It can also because you wish to schedule the filtering on or off as needed.

Given a MAC address you want to control, for example: aa:bb:cc:dd:ee:ff

You can perform the following functions on it:

# Block
/usr/sbin/ebtables -A FORWARD -d aa:bb:cc:dd:ee:ff -j DROP

# Unblock
/usr/sbin/ebtables -D FORWARD -d aa:bb:cc:dd:ee:ff -j DROP

Or even

# Flush (unblock all the defined references at once)
/usr/sbin/ebtables -F