Abstract
In the area of further academic training, open online courses (MOOCs) are also becoming increasingly interesting for universities. At the Technische Hochschule Lübeck – University of Applied Sciences, the pMOOCs project addresses professionals and examines open courses as a possible step into the higher education. The article introduces the MOOC «Network Security» in its specific design as an open educational resource (OER). The consequences of opening up are examined on the basis of usage statistics and evaluation results. In particular, MOOC participants show clear differences compared to traditional (online) students in the acquisition of participants, their interaction with the course and feedback on a subsequent exam to obtain a university certificate.