BITS operates a campus-wide WLAN radio network. Three networks are offered on the campus of Bielefeld University, which can be used either by members of the university (eduroam) or guests (guest, Bi-free).
Users have the option of connecting devices to the data network via the WLAN and using the services offered there.
The wireless LAN for students and employees on campus. Can also be used at many other off-campus locations of other eduroam members worldwide.
Eduroam(Education Roaming) is an initiative that enables members of participating organizations to access the Internet via WLAN at the locations of all participating organizations using their own account/password or certificate without having to apply for guest access on site.
The WLAN at Bielefeld University uses free frequencies of the ISM band. All frequencies in the 2.4GHz and 5GHz bands are used. Technologically, the WLAN is based on the family of IEEE 802.11 standards.
In order to set up the WLAN eduroam correctly and securely on mobile devices, DFN-Verein offers a convenient configuration assistant. Download at:
The eduroam CAT is available for download for various operating systems and platforms. For the department under Android, a corresponding app is required: eduroam CAT App for Android.
For the registration at the WLAN eduroam the personal login data must be entered in this form:
User name: BITS-Loginname@uni-bielefeld.de
Passwort: BITS password
In addition, the T-Telesec GlobalRoot Class 2 certificate is used/presupposed for the secure connection via 802.1x.
The root certificate required to connect to eduroam will change to "T-Telesec GlobalRoot Class 2" as of 2/1/2019. "email@example.com" must also be entered as the Outer Identity/Outer Identity. Further information in the blog.
Download root certificate (different formats):
.crt, .der, .pem
If the operating system asks to check the fingerprint of the certificate of eduroam.uni-bielefeld.de, it can be matched here.
:05 FC C8 12 57 C6 2D 4B 8C 7C 81 09 98 7B 52 4D 2F D6 62 A3
:EF A7 D0 43 20 C9 BE D2 62 68 14 48 2E 01 29 A9 F4 3E 9D 05 6B D3 76 FE 03 F6 34 93 64 81 29 BE
For guests of the faculties and departments, temporary access can be set up on request under the account of the host for the WLAN "guest". The temporary login data will then be provided by corresponding employees of Bielefeld University (host*in).
The free WLAN BI-free of the city of Bielefeld is also available at the university. In cooperation with BITel, this is broadcast on the university's access points. Connections to BI-free are automatically disconnected after one hour, after which you have to reconnect.
Further information and instructions:
Technical questions about BI-free can be answered by the support of BI
Tel:0521-32 93 111
(do not apply to Bi-free)
BITS-Beratung (Support Office)
Room: University Main Building V0-215
Mo.–Fr. 09:30–16:00 h
Tel.: 0521 10612777
For employees with a PC workstation provided by BITS
Mo.–Fr. 08:00–16:00 h
Tel.: 0521 106-6000
For other employees
Decentralised IT support of the faculty or institution.
Quick department without manual configurations via the eduroam CAT tool:
As of Android 11, the geteduroam app must be used for the department:
-> To the manual
Setting up WLAN under Windows 10 (advanced configuration)
Setting up WLAN under MacOS
Set up WLAN under iOS
Setting up WLAN under Android
Setting up WLAN under Android with CAT-Tool
Setting up WLAN from Android 11 via geteduroam