From MAP to DIST: The Evolution of a Large-Scale WLAN Monitoring System
The edge of the Internet is increasingly becoming wireless. Therefore, monitoring the wireless edge is important to understanding the security and performance aspects of the Internet experience. The authors have designed and implemented a large-scale WLAN monitoring system, the Distributed Internet Security Testbed (DIST), at Dartmouth College. It is equipped with distributed arrays of "Sniffers" that cover 210 diverse campus locations and more than 5,000 users. In this paper, they describe their approach, designs and solutions for addressing the technical challenges that have resulted from efficiency, scalability, security, and management perspectives. They also present extensive evaluation results on a production network, and summarize the lessons learned.