Bielefeld IT Service Centre
WLAN access
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.
Scope of services
eduroam
The wireless LAN for students and employees on campus. Can also be used at many other off-campus locations of other eduroam members worldwide.
- Background information on eduroam
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.
www.eduroam.org
Technology
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.
Configure eduroam
DFN-Verein offers a convenient configuration wizard to set up the WLAN eduroam correctly and securely on mobile devices. Download at:
https://cat.eduroam.org/?idp=5109
The eduroam CAT is available for download for various operating systems and platforms. The geteduroam app is required to set it up on iOS and Android.
Note on the login data
For registration on the WiFi eduroam, the personal login data must be entered in this form:
Login name: BITS-Loginname@uni-bielefeld.de
Password: BITS password (network password).
In addition, the USERTrust RSA Certification Authority certificate is used/presupposed for the secure connection via 802.1x.
- Verification and download of the certificate
Current HARICA certificate
The root certificate required for the connection with eduroam will change to root certificate "HARICA TLS RSA Root CA 2021" from HARICA from August 2025. "bitsuser@uni-bielefeld.de" must also be entered as the Outer Identity.
Download root certificate:
.crt, .cer, .der, .pemIf the operating system requests the fingerprint of the certificate from radius-eduroam.uni-bielefeld.de to be checked, this can be synchronised here.
sha-1:
C5:94:87:36:B8:7E:38:5C:71:AA:74:E4:F8:C9:12:6E:C4:57:F4:BEsha256:
DC:7A:7F:D0:5B:BF:91:A8:46:E5:9B:84:25:89:BD:47:71:43:31:FE:B8:BD:8F:D9:4D:09:D3:81:43:D1:BA:C8Still valid until 4 Nov. 2025
Root certificate "USERTrust RSA Certification Authority" from Sectigo. "anonymous@uni-bielefeld.de" must also be entered as the Outer Identity.
Download root certificate:
.crt, .der, .pemIf the operating system requests the fingerprint of the certificate from eduroam.hrz.uni-bielefeld.de to be checked, this can be synchronised here.
sha-1:
21:F2:75:82:32:31:C3:00:24:E1:82:05:CF:B6:4C:AB:A3:5C:A1:DDsha256:
D3:D7:A7:00:A0:E7:67:9A:CB:31:9F:3D:F1:82:B2:06:31:31:65:5E:DD:BF:5B:1E:7F:04:70:93:4B:19:87:C5
guest
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).
Bi-free
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:
https://www.stadtwerke-bielefeld.de/das-unternehmen/engagement/wlan-hotspots/
Technical questions about BI-free can be answered by the support of BI
Tel:0521-32 93 111
service@bitel.de
.
Requirements
Access
- eduroam: BITS-Loginname@uni-bielefeld.de network password
- guest: Temporary login name password
- Bi-free: Without login
Request
- eduroam: No application necessary, standard account for students, employees.
- guest: Via the IT supervision of the faculty or department supervising the guest. Alternatively, by placing your own order in the PRISMA portal.
- Bi-free: No application necessary.
Support
For students
BITS-Beratung (Support Office)
Room: University Main Building A0-301
Mo.–Fr. 09:30–16:00 h
Tel.: 0521 106-12777
E-mail: bits@uni-bielefeld.de
For employees with a PC workstation provided by BITS
Service Desk
Mo.–Fr. 08:00–16:00 h
Tel.: 0521 106-6000
E-mail: servicedesk@uni-bielefeld.de
For other employees
Decentralised IT support of the faculty or institution.
Manuals
eduroam
Quick setup without manual configuration using the eduroam CAT tool:
https://cat.eduroam.org/?idp=5109
The geteduroam app must be used for setup on Android and iOS:
Android Download
iOS Download
Windows
Set up WLAN under Windows 10 (advanced configuration)
Set up WLAN under Windows 11 (advanced configuration)
Mac
Set up WLAN under MacOS
Linux
Set up WLAN manually under Linux
Smartphones/tablets
Set up WLAN under iOS
Set up WLAN under Android
Set up WLAN under Android manually
