DCP -WR300N User Manual page 41

Choose Allow Listed as the access control mode to enable white list function.
Only the devices whose MAC addresses are listed in the Current Access
Control List can access the modem.
Choose Deny Listed as the access control mode to to enable black list function.
The devices whose MAC addresses are listed in the Current Access Control
List are denied to access the modem.
3.4.3.5 Advanced
Choose Wireless > Advanced, and the following page appears. In this page,
you can configure the wireless advanced parameters. It is recommended to use
the default parameters.
Note:
The parameters in the Advanced are modified by the professional personnel,
it is recommended to keep the default values.
Configuration
38 DCP-WR300N