Edimax Technology BR-6478AC - Manual (Page 51)

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IV-7-2. Access Control
Access Control is a security feature that can help to prevent unauthorized
users from connecting to your wireless router.
This function allows you to define a list of wireless devices permitted or not
permitted to connect to the router, identified by their unique MAC address or
IP address. If a device which is not on the list of permitted MAC or IP
addresses attempts to connect to the travel router, it will be denied.
To enable MAC filtering, check the box labeled “Enable Mac Filtering”.
To enable IP filtering, check the box labeled “Enable IP Filtering”.