About me


I'm a researcher in the Design and Analysis of Communication Systems (DACS) group at the Centre for Telematics and Information Technology (CTIT) at the University of Twente.

When I'm not working on my research in Twente, I am an R&D project manager at SURFnet, the National Research and Education Network (NREN) in The Netherlands. In my job I'm responsible for Internet innovation in the areas of network security and privacy.

For more information, see my CV.


My research focuses on security aspects of the Domain Name System (DNS) in the broadest sense. After IP, DNS is the most critical protocol on the Internet, without which the Internet effectively stops working for most users. I explore the security of the DNS using large scale measurements and statistical analysis, for instance studying the effects of the deployment of the DNS Security Extensions (DNSSEC), both in the positive (added security) as well as the negative (larger potential for abuse in DDoS attacks) sense. DNS also plays an important role in other security issues on the Internet, such as botnets, phishing and malware. Apart from performing my own research in this area, I contribute to the work of my colleagues who perform research in the area of network security and stability, helping them out with my expertise on the DNS.

My research is supported by SURF, the collaborative organisation for ICT in Dutch higher education and research, by the Netherlands Organisation for Scientific Research (NWO) and by SIDN Fonds.


Ph.D. thesis

Download the e-book version of my Ph.D. thesis

Current research

Other academic work









Master students

Bachelor students

Please contact me () if you are a master student interested in a measurement-based project on network security


E-mail (preferred)
+31-88-7873000 (SURFnet)
Social media
Roland van Rijswijk on LinkedIn
@reseauxsansfil on Twitter
Roland van Rijswijk on Google Scholar
Visiting address (UT)
Room ZI-5098
Faculty of EEMCS, Zilverling Building
University of Twente Campus
Enschede, The Netherlands
Campus map (Zilverling is building #11)