A group of researchers from the University of Michigan and Microsoft Research released a paper titled An Untold Story of Middleboxes in Cellular Networks in which they reveal why and how cellular service is both sub-optimal and insecure.
How did they do it? They developed a tool called NetPiculet, which uses intelligent measurement to probe middlebox policies in cellular networks, focusing on firewalls and NAT boxes, and released it into the wild in the form of an Android app. In addition to earning 50 points for coming up with a creative and effective way of gathering data from geographically diverse cellular networks, the team was rewarded with nearly 400 de facto data-gatherers who collected information on 107 cellular carriers worldwide.
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