Love it or hate it, peer-to-peer file sharing (P2P) is cemented in Internet culture, and it's not going to go away. Regardless of how you feel about the subject, there are many professional scenarios in which you do not want to allow most forms of P2P traffic while simultaneously letting through valid FTP, HTTP, SSH, BitTorrent, and other traffic. A good network administrator can create a complex solution with a software firewall in BSD or Linux, but it would be a lot easier if you could just plug in a simple network appliance to take care of it all for you, and that's exactly what SafeMedia Corp's Clouseau is designed to do. Unfortunately, it's a little too good at filtering, and isn't as unobtrusive to regular network traffic as it should be.
SafeMedia Clouseau review