For more information about the Guest network, click here. However, every time an additional device tries to connect to your Guest network, you will have to manually add the MAC address of that device to your allowed list under the MAC Filter page so it can successfully connect to your network. QUICK TIP: MAC address filtering will still work on devices that connect to the Guest network. NOTE: Enabling this option will disable the Wi-Fi Protected Setup™ feature.
If you have multiple routers, the MAC addresses saved on the first router should be manually configured and saved on the succeeding routers for all to have the same restrictions as the first router. The MAC Filter feature of your Linksys Smart Wi-Fi Router is a wireless security option that will allow or prevent access to your wireless network aside from setting up a password.