D-Link DSL-2642B User Manual page 58

Section 3 – Configuration
MAC address is a specially formatted text string (xx:xx:xx:xx:xx:xx) that
uniquely identification of a device. This section will allow users to block
devices with certain MAC addresses on the LAN.
To configure for MAC address blocking, enter the username into the
Username field, click Browser's MAC Address to have MAC address of
the LAN device, or click Other MAC Address and enter a MAC address
manually. Tick the checkboxes for the desired individual days of the week
and enter desired Start Blocking Time and End Blocking Time.
Click the Save/Apply button to save the configuration
D-Link DSL-2642B User Manual 58