Mac address Filter of the Fritz!Box set
- Type in the address line of your browser "fritz.the box". Then enter your password.
- Click in the menu on the left on [the radio network]bar
- In the main window you will now see the devices with the Fritz!Box (see image). Below this you can choose the Option "Wi-Fi access to the known devices limit", and click [Apply].
- Thus, the access to your Wi-Fi network is limited to the already connected devices. If you want to add more devices, click add a [wireless device]. Here you need to enter the Mac address of the new device.

Mac Filter in the Fritz!Box
Mac Filter with a Speedport Router
If you have a Router of Deutsche Telekom (Speedport), proceed as follows.
- Type in the address of your browser, "speed-port bar.ip" or "192.168.2.1" in. Then, you log in with your password and confirm with [OK].
- Click in the menu on the left of [security] bar, and select the sub-item [Mac filtering].
- Click [operation condition] and change the setting to "on". Then you confirm the setting with [Save].
- Via [PC Take&Share] you can add new devices. For this you need the relevant Mac address.

Mac Filter at a speed port
So you can find out the Mac address
To add a new device, you will need the Mac address of the PC or mobile device. This consists of six, two groups of Numbers and letters (Hexadecimal), for example: 00-13-02-AF-B6-1C
- In the majority of mobile devices (Smartphones, Tablets, ebook readers), you can find the Mac address in the wifi settings.
- In the case of Windows PCs as of Windows 2000, you [Win]+[R] press and enter "cmd". It is a DOS window opens. Here you can all type "ipconfig/". Under "Wireless LAN Adapter wireless connection" you will find the "Physical address" is the Mac address.

Mac-address on "ipconfi
- In the case of Mac OS X, open the [system settings] and click in the heading "Internet & network" [network]. Here you select the Airport card and can be read at the Airport the Mac address.

Mac address in OS X