Internet measurement

This paper examines different reasons for web inaccessibility. Prior work on accessibility mostly focuses on censorship by nation-states. We look at three forms of server-side blocking: blocking visitors from the EU to avoid GDPR compliance, blocking based upon the visitor’s country, and blocking due to security concerns. We argue that Read more…

Internet-wide scanning depends on a notion of liveness: does a target IP address respond to a probe packet? However, the interpretation of such responses, or lack of them, is nuanced and depends on multiple factors, including how we probed, how different protocols in the network stack interact, the presence of Read more…