[Posted by Revision3 CEO Jim Louderback on Revision3.com's Blog]

Internet attacks leave lots of evidence. In this case it was pretty easy to see exactly what our shadowy attacker was so upset about. It turns out that those zillions of SYN packets were addressed to one particular port, or doorway, on one of our web servers: 20000. Interestingly enough, that’s the port we use for our Bittorrent tracking server. It seems that someone was trying to destroy our bittorrent distribution network.

Let me take a step back and describe how Revision3 uses Bittorrent, aka BT. The BT protocol is a peer to peer scheme for sharing large files like music, programs and video. By harnessing the peer power of many computers, we can easily and cheaply distribute our huge HD-quality video shows for a lot less money. To get started, the person sharing that large file first creates a small file called a “torrent”, which contains metadata, along with which server will act as the conductor, coordinating the sharing. That server is called the tracking server, or “tracker”. You can read much more about Bittorrent at Wikipedia, if you really want to understand how it works.

Revision3 runs a tracker expressly designed to coordinate the sharing and downloading of our shows. It’s a completely legitimate business practice, similar to how ESPN puts out a guide that tells viewers how to tune into its network on DirecTV, Dish, Comcast and Time Warner, or a mall might publish a map of its stores.

But someone, or some company, apparently took offense to Revision3 using Bittorrent to distribute its own slate of shows. Who could that be?

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