Comcast are claiming that are not using programs to block p2p.

[tig]

http://www.p2pnet.net/story/13717

But in September, “we spoke with Comcast to try to find out what was going on in this case,” posted the EFF’s (Electronic Frontier Foundation) Seth Schoen (right) and, “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).”

Now Schoen says following the AP revelations, “we’ve been running our own tests” and Lo! - “Comcast is forging TCP RST packets which cause connections to drop (a technique also used by Internet censorship systems in China).

“These packets cause software at both ends to believe, mistakenly, that the software on the other side doesn’t want to continue communicating.

Well it shows that they are not trying to damage to anyone using Comcast. However they do know what the problem is.

[James420]

They're making fake TCP RST packets that claim they are from the source you're actually trying to get the file from. And the packets pretty much tell the computer that there is no connection. Stopping you from pretty much doing anything, even stops dht.

Although...if you force encryption on the torrent client you're using. It'll encrypt the headers on the packets. So their method won't work then. But then again, it'd just be smarter to ditch them and go with something better.