%0 Report %A Feldmann, Anja %A Gasser, Oliver %A Lichtblau, Franziska %A Pujol, Enric %A Poese, Ingmar %A Dietzel, Christoph %A Wagner, Daniel %A Wichtlhuber, Matthias %A Tapiador, Juan %A Vallina-Rodriguez, Narseo %A Hohlfeld, Oliver %A Smaragdakis, Georgios %+ Internet Architecture, MPI for Informatics, Max Planck Society Internet Architecture, MPI for Informatics, Max Planck Society Internet Architecture, MPI for Informatics, Max Planck Society External Organizations External Organizations Internet Architecture, MPI for Informatics, Max Planck Society External Organizations External Organizations External Organizations External Organizations External Organizations External Organizations %T The Lockdown Effect: Implications of the COVID-19 Pandemic on Internet Traffic : %G eng %U http://hdl.handle.net/21.11116/0000-0007-0641-9 %U http://arxiv.org/abs/2008.10959 %D 2020 %X Due to the COVID-19 pandemic, many governments imposed lockdowns that forced hundred millions to stay at home. As a result of these measures, Internet traffic of residential users increased, in particular, for remote working, entertainment, commerce, and education. In turn, traffic demands in the Internet core shifted as well. In this paper, using data from a diverse set of vantage points (one ISP, three IXPs, and one metropolitan educational network), we study the effect of these lockdowns on traffic shifts. We find that the traffic volume increased by 15-20% almost within a week--while overall still modest, this constitutes a large increase within this short time period. The Internet infrastruct ure is able to handle this increase, as most traffic shifts occur outside of traditional peak hours. When looking at traffic sources, we find that while hypergiants still contribute a significant fraction of traffic, we see a higher increase in traffic of non-hypergiants. We observe traffic increases in applications such as Web conferencing, VPN, gaming, messaging that people use when at home. While many networks see increased traffic demands, in particular, residential users, others see major decreases, e.g., the in/out ratio of the educational network switched. %K Computer Science, Networking and Internet Architecture, cs.NI,Computer Science, Computers and Society, cs.CY

%0 Conference Proceedings %A Maghsoudlou, Aniss %A Gasser, Oliver %A Feldmann, Anja %+ Internet Architecture, MPI for Informatics, Max Planck Society Internet Architecture, MPI for Informatics, Max Planck Society Internet Architecture, MPI for Informatics, Max Planck Society %T Reserved: Dissecting Internet Traffic on Port 0 : %G eng %U http://hdl.handle.net/21.11116/0000-0006-0D13-7 %U http://arxiv.org/abs/2004.03653 %D 2020 %B The Passive and Active Measurement Conference %Z date of event: 2020-03-30 - 2020-03-31 %C Virtual Conference %X Transport protocols use port numbers to allow connection multiplexing on Internet hosts. TCP as well as UDP, the two most widely used transport protocols, have limitations on what constitutes a valid and invalid port number. One example of an invalid port number for these protocols is port 0. In this work, we present preliminary results from analyzing port 0 traffic at a large European IXP. In one week of traffic we find 74GB port 0 traffic. The vast majority of this traffic has both source and destination ports set to 0, suggesting scanning or reconnaissance as its root cause. Our analysis also shows that more than half of all port 0 traffic is targeted to just 18 ASes, whereas more than half of all traffic is originated by about 100 ASes, suggesting a more diverse set of source ASes. %K Computer Science, Networking and Internet Architecture, cs.NI %B Extended abstract of a poster presented at Passive and Active Measurement Conference (PAM) 2020