If you’ve ever used BitTorrent (Tomato Torrent client for Mac OS X) and were disappointed by the download speeds, try poking a hole through your firewall from 6881 to 6889. It quadrupled the speeds I was getting.

For those using the default Mac OS X firewall, you can edit the open ports in the “Sharing” section of the preferences and for those on Windows, check the ports section of your firewall application.

Besides this being cool, how much of a security threat does this now pose?