Note: For mobile devices (Android, Iphone), please ensure that you do not provide us with a randomised MAC address. We can't do anything with that.
Apple MacOS: Hold down the Options button and click on the WLAN symbol in the taskbar. Please take an ideal screenshot.
iPhone: Settings, WLAN
Android: Settings, Internet, cogwheel (eduroam).
Windows: Please call up the command prompt with the key combination Windows key + R. Enter the command "getmac /v".
Linux: ip a