Amped Wireless SR600EX - High Power Wireless-N 600mW Pro Range Extender - Manual (Page 31)

SR600EX USER’S GUIDE
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User Access Control
User Access allows you to deny access or allow
access to specific users connecting wirelessly to the
Extended Network. Each networking device has a
unique address called a MAC address (a 12 digit hex
number).
By inputting the MAC address into the field, you can
define whether that device is allowed into your
network or not allowed.