In order to integrate your PC or notebook into the University network and thus be able to use access-restricted services and offers bound to our IP address range, your PC/notebook must be temporarily assigned an IP address of the KU. This is made possible by adding a so-called VPN connection (Virtual Private Network) between your PC and our University network. The data traffic between your PC/notebook and the VPN server is encrypted with a powerful encryption method (AES, 256 bit).

The University Computer Center works with a VPN access based on OpenVPN.

configuration file / certificate

OpenVPN for Windows


Tunnelblick for macOS


OpenVPN for Android


OpenVPN for iOS/iPadOS


OpenVPN for Ubuntu


OpenVPN with a certificate / OpenVPN for Windows and Kabel-KUE


Certificate for Windows

Here, you will find the current valid certificate which you should replace in time before the old certificate expires. In order to do so, please replace the file zertifikat.p12 in the directory C:\Program files\OpenVPN\config. 

The current certificate:
zertifikat.p12  (valid until January 31, 2024)

If you encounter problems, you can also carry out a new installation of the OpenVPN client. This also includes the correct configuration files with the current certificate.

Source code

For legal reasons, we are obliged to also provide the source code of the software. However, this is not required for a functional installation.

openvpn-2.3.8.zip [1.3 MB | ZIP]