Comcast continues to block peer-to-peer, EFF reports
By
Grant Gross
,
IDG News Service
, 11/30/2007
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Comcast continues to slow down customers' connections to some peer-to-peer applications, using hacker-like techniques against its own subscribers, according to a report released by the Electronic Frontier Foundation.
But Comcast officials, first accused of blocking peer-to-peer application BitTorrent and other traffic in an October Associated
Press story, insisted they're not stopping any Web traffic from getting to their customers. The cable broadband provider does
manage its network, which would slow to a crawl if it did not manage bandwidth-hogging peer-to-peer connections during times
of heavy congestion, a company official said.
At times, Comcast will delay peer-to-peer traffic, but the traffic will eventually go through, said Charlie Douglas, Comcast's
director of corporate communications.
"Comcast does not, has not, and will not block any Web site or online application, including peer-to-peer services, and no
one has demonstrated otherwise," Douglas said. "We engage in reasonable network management to serve all of our customers with a good Internet experience."
But the EFF defined Comcast's actions differently. Comcast, the second largest ISP in the United States, uses a technique
called packet forgery to slow some subscriber traffic, the EFF said in a report released Thursday. Comcast appears to be injecting RST, or reset, packets into customers' connections, causing connections
to close, the EFF said.
The EFF's own tests confirmed tests run by the Associated Press and others that said Comcast was disrupting traffic, the group
said. The packet forgery techniques can cause several problems, depending on the applications a customer is using, the EFF
said.
"One objectionable aspect of Comcast's conduct is that they are spoofing packets -- that is, impersonating parties to an exchange
of data," the EFF said in its report. "Comcast is essentially deploying against their own customers techniques more typically
used by malicious hackers (this is doubtless how Comcast would characterize other parties that forged traffic to make it appear
that it came from Comcast)."
Comcast's action is worse than if it dropped a proportion of packets during times of congestion, the EFF said. "Comcast is
essentially behaving like a telephone operator that interrupts a phone conversation, impersonating the voice of each party
to tell the other that 'this call is over, I'm hanging up,'" the group said.
The EFF report suggests that Comcast was not just slowing peer-to-peer traffic but also access to IBM's Lotus Notes e-mail
and calendaring software. Douglas denied this, saying a bug that caused problems in Notes happened at the same that Comcast was accused of blocking
Web traffic.
Comcast's actions have led supporters of net neutrality rules to renew calls for the U.S. Congress to pass a law prohibiting
broadband providers from blocking or slowing Web traffic. Comcast's slowing of traffic creates a situation where Web innovators
would have to ask permission for their applications to get unfettered access to broadband networks, the EFF said.
The IDG News Service is a Network World affiliate.
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