ChromeOS
Open your WiFi settings menu and select the network "uni-halle". This will open the Security settings page for your chosen network.
Choose "PEAP" as the EAP authentication method and "Automatic") for the phase 2 authentication method .
For the "CA certificate" setting, select "Default".
Enter "uni-halle.de" (without the quotation marks) for the domain.
Your username is your usual five-character identifier.
Leave the "Anonymous identity" field empty.
Your password is the one you set in the Serviceportal.
Tap "Connect" or "Save" after entering the above settings.
If everything has been set up correctly, your device should have successfully established a connection with the university network.