The Robustness of networks is not only affected by the accidential disconnection of systems and sites but also by intentional, malicious activities. Therefore, NorNet would also like to support research on network security in the context of multi-homed networks. An overview on NorNet has therefore be presented today at the 7. Essener Workshop zur Netzsicherheit (EWNS 2013) at the University of Duisburg-Essen in Essen, Germany. The talk abstract can be found here.