[Apologies to those on NANOG who already saw this. Given the recent discussion on this mailing list, it seemed appropriate to cross-post it here.] Hi folks, We've just released a new tool that allows you to see network problems from end-user machines, currently BitTorrent users. (Think of this as putting P2P traffic to good use.) The interface that we've provided is still very beta, but we'd appreciate any (constructive) feedback. A little more detail: we've deployed software called NEWS (network early warning system) that uses P2P users' natural traffic to detect sudden, unexpected drops in network performance -- this allows our 25k BitTorrent users to corroborate network problems with each other. Our tool, called Newsight, lets you see summaries of their reported network anomalies. You can browse a timeline of anomalies grouped by country, AS or prefix. You can also confirm known network problems, helping to create a public database of outages and their explanations. You can play with Newsight here: http://aqualab.cs.northwestern.edu/projects/news/newsight.html Cheers, Dave (on behalf of the Aqualab research group) -- David Choffnes PhD Candidate, Computer Science Northwestern University