September 13, 2007 | By Seth Schoen

Comcast and BitTorrent

We've been receiving a lot of inquiries from people concerned about recent allegations that Comcast is interfering with its subscribers' use of the BitTorrent protocol, perhaps by using an appliance that disrupts BitTorrent sessions. Some of the people contacting us are Comcast subscribers who've had trouble with BitTorrent recently and think that they might be affected by the same problem.

Debugging network problems can be complicated because of the varieties of versions and configurations of client software and the number of places in the network where problems could occur. Most mysterious network errors aren't intentionally caused by anyone. But some ISPs and universities have experimented with appliances that block or disrupt particular traffic, such as VoIP or P2P file-sharing traffic.

On Wednesday, we spoke with Comcast to try to find out what was going on in this case. Comcast assured us that, while it does do some kinds of network management on its residential network, it isn't deliberately blocking, degrading, interfering with, or discriminating against particular protocols or kinds of traffic. (This is consistent with what Comcast told the press in August when these allegations were widely raised.) The company said that it isn't using network management techniques that are designed to disrupt anyone's use of BitTorrent (or any other application).

If anyone has repeatable indications that something else is going on, please let us know -- we'd be happy to bring it up with Comcast to try to get to the bottom of the situation.


Deeplinks Topics

Stay in Touch

NSA Spying

EFF is leading the fight against the NSA's illegal mass surveillance program. Learn more about what the program is, how it works, and what you can do.

Follow EFF

Yes, it's still legal to film the police. Know your rights before you start recording: https://eff.org/r.w6lj

Aug 31 @ 12:59pm

You might need a drink after reading about August's Stupid Patent of the Month attacking the Internet of Things: https://eff.org/r.bpl9

Aug 31 @ 12:42pm

New story from the @ap: People are filming the cops more often. They're also getting arrested for it more often. https://eff.org/r.6ig

Aug 31 @ 12:29pm
JavaScript license information