Canon i-SENSYS LBP6670dn User Manual page 672

Set the MAC address.
(1) Enter the MAC address of a device of which you want to permit to access.
Enter the MAC address without the hyphens (-), for example, AABBCCDDEEFF.
(2) Click [Add].
You can set up to 50 addresses.
NOTE
When deleting a set MAC address
(1) Select a MAC address you want to delete.
(2) Click [Delete].
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