CAIDA - Cooperative Association for Internet Data Analysis
Internet Background Radiation (IBR) is unsolicited network traffic mostly generated by malicious software, e.g., worms, scans. In previous paper, the authors extracted a signal from IBR traffic arriving at a large (/8) segment of unassigned IPv4 address space to identify large-scale disruptions of connectivity at an Autonomous System (AS) granularity, and used their technique to study episodes of government censorship and natural disasters. Here they explore other IBR-derived metrics that may provide insights into the causes of macroscopic connectivity disruptions. They propose metrics indicating packet loss (e.g., due to link congestion) along a path from a specific AS to their observation point.