This is most often found within a router's 'Wireless' or 'Wireless Security' options.Search through your router's settings until you locate the tab or setting 'MAC Filtering'.If you wish to use this feature on your network, we recommend you contact the router manufacturer for assistance in setting this up. For troubleshooting purposes, you do not need to enable MAC filtering if this is already disabled.If MAC filtering is enabled on a wireless router, any wireless devices connected to that router will be unable to connect until their MAC address is entered into the MAC filter settings.