The WLan HBRSInfo is an unencrypted WLan, which does not require authentication.
Access to this FAQ of the Department of Computer Science is possible via this WLan. It also allows access to certmk, the portal of the Department of Computer Science for the generation of user certificates.
Furthermore horde (webmail interface of the computer science) and the general university webseites are accessible.
It does not allow access to the Internet.