For The Router's Web-Based Utility - Linksys WRT54GS User Manual

Wireless-G Broadband Router with SpeedBooster
3. Write down the Physical Address as shown on your computer screen; it is the MAC address for your Ethernet
adapter. This appears as a series of numbers and letters.
The MAC address/Physical Address is what you will use for MAC address cloning or MAC filtering.
Note: The MAC address is also called the Physical Address.
Another screen will show the Ethernet adapter's IP address. (Shown in the example as 192.168.1.100.) Your
computer may show something different.

For the Router's Web-based Utility

For MAC filtering, enter the 12-digit MAC address in this format, XXXXXXXXXXXX, WITHOUT the hyphens.
For MAC address cloning, enter the 12-digit MAC address in the MAC Address fields provided, two digits per field.
Appendix E: Finding the MAC Address and IP Address for Your Ethernet Adapter
For the Router's Web-based Utility
Figure E-4: MAC Address Filter List
Figure E-5: MAC Address Clone
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