Although it’s rare, some ISPs actually prevent customers from contacting BitTorrent trackers. A good and free way to circumvent this is to use TOR, just remember not to run any BitTorrent transfers over it.
“There are several ways of contacting web addresses you’re not allowed to contact: using a web-based site like HideMyAss.com, or similar services. Configuring your Bittorrent client to use a web-based proxy is often not easy or impossible. That’s why we’ll turn to TOR.”
