Asus AM604g - Manual (Page 33)

If you click on Change Policy, a confirmation dialog allows you to
verify your change.
If you want to add a setting to the MAC filtering table, enter the
Source and Destination MAC address, and select protocol type,
frame direction, and WAN interface. Then click on Save / Apply to
save it.
ASUS 4-Port Wireless Ethernet Router
User Manual
32
Version 1.0
Document #: BD-AU0014-10