Unlocking the Comcast handcuffs
p2pnet news | P2P:- Back in August we reported that Comcast was limiting BitTorrent traffic. Comcast denied our allegations, even though we had some pretty solid evidence.
However, a recent test by Associated Press confirmed what we have been reporting all along. The million dollar question remains, can Comcast subscribers get around this, and more importantly, how?
Comcast is using an application from the broadband management company Sandvine to throttle BitTorrent traffic. It breaks every (seed) connection with new peers after a few seconds if it’s not a Comcast user inside your community boundary.
According to some Comcast technicians who were brave enough to tell the truth, these Sandvine boxes are installed at the cable modem termination system. As a result, it’s virtually impossible to seed a file, especially in small swarms without any neighboring Comcast users.
The good news is there are several ways to fight back and get BitTorrent up and running again.
Robb Topolski, a networking and protocol expert ,summed up some of the workarounds that reportedly solve the throttling issues.
What is working
1. Quite a few Comcast users report that forcing protocol header encryption completely eliminates the problems. This is the easiest solution since most BitTorrent clients support encryption. Please note that simply enabling encryption is not enough, it has to be forced. More details on how to do this can be found over here.
2. Another successfully workaround is to run BitTorrent over encrypted tunnels such as SSH or VPN. BitTorrent over SSH works, but it will cripple the servers of the SSH providers if you plan to use it permanently. A VPN service such as Relakks or VPNTunnel is a better option, and it is worth a few bucks.
3. Comcast prevents seeding, if you’re on a private tracker, and want to share as much as possible, an easy solution is to lower your download rate. When downloading, make sure that you have met your uploading goal by the time that the download completes. The easiest way to accomplish this is to set a download rate slower than the uploading rate. This of course is not an optimal solution because your download will never be faster than you upload speed.
4. One of the best options, if possible, is to switch to another ISP.
What is not working
1. Some people suggested setting your firewall to drop RST packets could be effective. However, this isn’t the case. The RST-messages Comcast sends go in both directions, ignoring the RST on only one side creates a useless half-open connection.
2. According to most reports, enabling the Lazy Bitfield option in your BitTorrent client doesn’t solve the problem either.
3. Reporting the issue to Technical Support. No explanation needed here.
4. Grab a hammer, visit the Comcast office, smash a keyboard and knock over a monitor. This might sound like a great alternative but apparently it only results in jail time.
I’d advise affected Comcast subscribers to play around with these alternatives; some solutions that work for one person, might not work for another. Do you have another solution that is not reported here?
Let us know in the comments!
Torrentfreak – The Netherlands
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October 22nd, 2007 at 10:06 am
What to do with comcast? we have seen that the hammer gives a lot of satisfaction, but no good results. Yhe only other option is to cast the scoundrels out, which I am doing today. going back to bellsouth and hoping for better days. Too bad comcrap has a monopoly, and there are no federal or state regulations against Comcrap as tyhere are for cetain other utilities and monopolies
July 12th, 2008 at 6:24 pm
I want everyone who has read ANYWHERE that using Linux or Mac IP Tables to drop the forged packets with with the rst flag set won’t help solve your peering problems to IGNORE what all the negative nellies are telling you!! I was a windows user on Comcast’s network and until yesterday, my seeding capacity was ZERO…period…no seeding unless it was during the initial download. Yesterday I installed Ubuntu, dropped those bad, bad rst packets with the proper command and VOILA! I was seeding like crazy. So, if you wanna stick it to Comcast and everyone else using Sandvine – SWITCH TO LINUX OR MAC AND USE YOUR IP TABLES TO DROP THE FORGED RST PACKETS!!! It will fix your problem because now EVERYONE ELSE IS DROPPING THEIR PACKETS TOO!! So the packets get dropped from both sides and no rst is performed. JUST DO IT!! You’ll be glad you did. I’ll be happy to send you screen shots of two machines, side by side, one on windows and one on Linux…with the windows machine seeding to no one and the linux machine seeding like crazy. It really works! BELIEVE IT!