MediaDefender is a company that was hired by the RIAA and MPAA to perform DoS and DDoS attacks on BitTorrent tracker servers suspected of hosting illegal files. Over the Memorial Day weekend this year, they attacked Revision3 (Louderback, 2008), a Web2.0 and Internet media company that hosts multiple audio and video podcasts. Because they were being flooded with over 8,000 SYN requests per second, they could not keep their site up. What added insult to injury was the fact that Revision3 found out who was performing the attack, but could not reach anyone at MediaDefender as it was a holiday weekend, and apparently they left the attack running and headed out to the picnics. When Revision3 finally did contact MediaDefender on Tuesday morning, it took an additional one and a half hours to stop the attack on the Revision3 servers. The attack was directed at port 20000 of the Revision3 BitTorrent tracking server (Louderback, 2008). BitTorrent is a form of peer-to-peer (P2P) file sharing that uses a tracking server, or trackers, and distributed files to provide quick and efficient file transfer, particularly for large files over the Internet or other networks. Rather than hosting the files themselves as in other P2P networks, a BitTorrent tracker simply keeps track of the files that users are sharing and which users have which bits. By doing so, it can enable other users to connect to the network and download all of the bits into one cohesive usable file on their computer, all the while sharing out the relevant bits that they have already received.
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