MAC addresses in the Fritzbox lock
Individual MAC addresses can you lock it in the Fritzbox. For this purpose, a so-called MAC-Filter enable. Here you have to enter only the MAC addresses of devices that are allowed to use your Wi-Fi. All other MAC-IDs are locked and can't connect to your Router.
- First, open the user interface of the Fritz box in your Browser and login with your password.
- In the left column, click "wireless" then "security".
- There you scroll down to the section "Wi-Fi access restrict".
- You put at the very bottom of a check in the "Wi-Fi access to known WLAN devices restrict".
- Now click on "Wi-Fi add device" and enter the MAC address of your device. Repeat this step for all devices to use the network later.
- Save your Changes finally, with "Apply". After that, all the alien MAC locked out addresses.

Fritzbox: Mac address blocking
Tip: you Have to enter friends visiting who want to use the Wi-Fi, you must have the MAC addresses of all individually. Instead, a temporary guest access in the Fritz box is a.
