The Deutsche Telekom Root CA 2 - certificate expires on 09. Juli 2019
So far the university network used Deutsche Telekom Root CA 2, which expires on 09. Juli 2019. This is why older wifi-profiles will not work anymore after we switch our radius-server over to the new certificate.
The replacement for the Deutsche Telekom Root CA 2 certificate is the T-Telesec GlobalRoot Class 2 certificate, which is expires on 09. Oktober 2033.
For a trouble-free transition, we already offer new wifi-profiles with the T-Telesec GlobalRoot Class 2 certificate.
These profiles are already available on the serviceportalunder the following link: Manuals Wifi.
Why do we need a certificate?
A network verifies Username and password of a user through a radius-server.
To prevent sending this data to untrustworthy authentification servers, the client verifies the trustworthiness of the radius-server by means of the certificate.