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Comcast Confirmed as Discriminating Against FileSharing Traffic
Posted by
Zonk
on Fri Oct 19, 2007 10:21 AM
from the harshing-on-my-patching dept.
from the harshing-on-my-patching dept.
An anonymous reader writes "Comcast has been singled out as discriminating against filesharing traffic in quantitative tests conducted by the Associated Press. MSNBC's coverage of the discovery is quite even-handed. The site notes that while illegal content trading is a common use of the technology, Bittorrent is emerging as an effective medium for transferring 'weighty' legal content as well. 'Comcast's technology kicks in, though not consistently, when one BitTorrent user attempts to share a complete file with another user. Each PC gets a message invisible to the user that looks like it comes from the other computer, telling it to stop communicating. But neither message originated from the other computer -- it comes from Comcast.'" This is confirmation of anecdotal evidence presented by Comcast users back in August.
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Ask Slashdot: Comcast and Net Speed Tests 290 comments
JimDaGeek writes "I recently moved to Columbia, SC where I have Time Warner as my cable ISP and pay for an 8 Mbps connection and have been very happy with the service, speed, and reliability. In contrast I have heard bad things about Comcast. So now that I am up in the Philadelphia PA area visiting my parents, I decided to test out the speed and reliability using the Speakeasy speed test. The results surprised me. Here are the reported download speeds in Kbps: New York, 18,946; Washington, 15,821; Atlanta, 11,257; Chicago, 10,042; San Francisco, 4,230. What is going on? I know my father is not paying for a 10+ Mbps connection. Is Comcast giving priority to popular speed-test sites?" From Comcast's site, in the Philadelphia area they seem to offer download speeds of 6 or 8 Mbps, with an option for a "PowerBoost" to 12 Mbps on large files. This wouldn't explain the results JimDaGeek got of almost 19 Mbps down.
Update: 07/10 12:07 GMT by KD : A friend in Massachusetts had a tree fall on his house. The Comcast guy who reconnected the lines told him that they are boosting the line speed to 20 Mbps down / 2 Mbps up in certain areas to be more competitive with Verizon FiOS.
Update: 07/10 12:07 GMT by KD : A friend in Massachusetts had a tree fall on his house. The Comcast guy who reconnected the lines told him that they are boosting the line speed to 20 Mbps down / 2 Mbps up in certain areas to be more competitive with Verizon FiOS.
[+]
Your Rights Online: Comcast Hinders BitTorrent Traffic 537 comments
FsG writes "Over the past few weeks, more and more Comcast users have reported that their BitTorrent traffic is severely throttled and they are totally unable to seed. Comcast doesn't seem to discriminate between legitimate and infringing torrent traffic, and most of the BitTorrent encryption techniques in use today aren't helping. If more ISPs adopt their strategy, could this mean the end of BitTorrent?"
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Comcast Cuts Off Users Who Exceed Secret Limit 574 comments
ConsumerAffairs.com has an article up spotlighting Comcast's tendency to cuts off heavy Internet users without defining in their AUP exactly what the bandwidth limit is. Frank Carreiro of West Jordan, Utah, got cut off by the mystery limit and started a 'Comcast Broadband dispute' blog.
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Your Rights Online: Comcast May Face Lawsuits Over BitTorrent Filtering 378 comments
An anonymous reader writes "It's been widely reported that Comcast is engaged in a sneaky form of Internet filtering. The company is terminating its customers' BitTorrent sessions by sending misleading data onto the network. The end result is that instead of targeting key heavy users, Comcast is instead engaged in an all out war against P2P protocols. In an interview with CNET, the Electronic Frontier Foundation's Fred von Lohmann states that Comcast is 'throwing a spanner in the works of the Internet, hoping that this will somehow reduce bandwidth usage overall.' Other lawyers seem to have smelled blood, and are circling in the water. Lohmann reveals that '[The EFF has] already been contacted by attorneys who are considering legal action against Comcast.' Could Comcast be facing a class-action?"
[+]
Your Rights Online: Comcast Sued Over P2P Blocking 268 comments
CRISTAROL writes "Comcast has been sued by a California resident for blocking BitTorrent and other traffic. 'John Hart describes himself as a Comcast customer who has seen performance hits when using "Blocked Applications" targeted by Comcast's traffic management application, Sandvine. In his complaint, Hart says that Comcast severely limits "the speed of certain internet applications such as peer-to-peer file sharing and lotus notes [sic]." Comcast accomplishes this by "transmitting unauthorized hidden messages" to the PCs of those using the applications.' The lawsuit comes on the heels of an FCC complaint over the same issue."
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Entertainment: Comcast Targets Unlicensed Anime Torrenters 352 comments
SailorSpork writes "According to a thread on the forums of AnimeSuki, a popular anime bittorent index site, Comcast has begun sending DCMA letters to customers downloading unlicensed fan-subtitled anime shows via bittorrent. By 'unlicensed', they mean that no english language company has the rights to it. The letters are claiming that the copyright holder or an authorized agent are making the infringement claims, though usually these requests are also sent to the site itself rather that individual downloaders. My question is have they really been in contact with Japanese anime companies, or is this another scare tactic by Comcast to try and reduce the bandwidth use of their heavier customers now that their previous tactics have come under legal fire?"
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News: Legal Trouble For Multiple ISPs 303 comments
Ars Technica reports that Comcast has been hit with three new class-action lawsuits due to the company's traffic-shaping practices. "The lawsuits ... ask that Comcast be barred from continuing to violate various state laws, in addition to unspecified damages." Meanwhile, members of the US House Telecommunications Subcommittee have asked Charter Communications' president to stop testing a program which uses Deep Packet Inspection to track the habits of its customers. A number of privacy groups have voiced their support (PDF). As if that weren't enough, it seems the City of Los Angeles is suing Time Warner for fraud and deceptive business practices. The Daily News notes, "... the City Attorney is seeking $2,500 in civil penalties for each violation of the Unfair Competition law as well as an additional $2,500 civil penalty for each violation described in the complaint perpetrated against one or more senior citizens or disabled persons."
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Any World of Warcraft users... (Score:5, Informative)
Just wondering since WoW uses Bittorrent to distribute its patches (one example of a very legitimate use).
Re:Any World of Warcraft users... (Score:4, Interesting)
</anecdote>
Parent
Encrypt Everything (Score:5, Insightful)
Re:Encrypt Everything (Score:4, Interesting)
Are they allowed to do the same thing with Skype (or anything else they want) and tell the other side I want to disconnect? Where is the legal line?
Parent
Illegal forgery and defense (Score:5, Interesting)
Just because it is their network DOES not give them the right to FORGE IP packets to look as if they come from elsewhere.
That would be like a courier service forging documents from 2 people wanting to communicate saying "Stop sending documents" if they didn't want them to talk. They'd never do something that stupid, and if they did, they couldn't get out of charges by saying they were only forging documents through their service.
Forgery is illegal. Someone who had a forged RST packet sent in their name should have forgery charges pressed and sue for impersonation.
A technical defense is to block RST packets. Probably not hard to do under Linux, and likely trivial.
Parent
Re:Illegal forgery and defense (Score:5, Insightful)
Also probably very silly to do. And won't work unless both ends of the communication are doing it.
Parent
Re:Illegal forgery and defense (Score:5, Insightful)
I guess it might work for a while until you ran out of memory for tracking state of all the connections that never close.
Parent
Re:Illegal forgery and defense (Score:4, Informative)
http://redhatcat.blogspot.com/2007/09/beating-sandvine-with-linux-iptables.html [blogspot.com]
That was linked from the first result (a Digg article) for "iptables DROP RST".
Parent
Good (Score:3, Interesting)
Now maybe the "net neutrality isn't important because we can trust giant corporations not to screw their customers crowd" will shut up. Of course, the people getting paid to lobby or keep those bills out of Congress won't change their mind, but maybe regular people will. And that's a step in the right direction.
This story does make me wish I was not boycotting Comcast already though, so I could boycott it for this.
Re:Good (Score:5, Informative)
Actually, this will hurt net neutrality because everyone is getting QoS confused with Net Neutrality!
QoS is legal, and it should exist. Prioritizing classes of traffic is OK, provided the classes are generic classes of traffic (e.g., email, web, ftp, p2p, voip, etc).
Net Neutrality is compatible with QoS. What Net Neutrality proponents want isn't avoidance of QoS, but to prevent deals where if you use Windows Live Search, it comes up instantly, while if you use Google, you'll find yourself waiting a good minute for the frontpage to load up. I.e., both use the same class of traffic (web), but service is differentiated based on who can pay.
So Comcast causing Bittorrent problems is OK for Net Neutrality. But if Comcast suddenly lets Blizzard's WoW updates unimpeded while causing problems for say, Linux ISO torrents, then that conflicts with Net Neutrality.
Basically, like traffic should be treated alike. But unlike traffic may be treated differently. So if Comcast charged an extra $10 for enhanced VoIP QoS, that's OK, as long as it's for all VoIP, not just say, Vonage only, or Skype.
Net Neutrality opponents like to bleat the Anti-QoS line because it's the easiest way to spread FUD, when they really mean "Google, pay us, or we'll make your page take ages to load, while making Windows Live Search load instantly".
Parent
World of Warcraft (Score:5, Insightful)
Encryption (Score:5, Informative)
Re:Encryption (Score:4, Insightful)
That's the entire premise of a man-in-the-middle attack - give both sides false keys, but hang onto the false keys and the real keys yourself, then encrypt/decrypt accordingly with appropriate keys in each direction to keep them oblivious to your presence.
Taking a stance like "well at least we still have encryption," rather than fighting for your rights is extremely dangerous. People keep saying "they aren't a common carrier, so they're within their rights."
What the hell? When is it within a carrier's rights to WILLFULLY LIE ABOUT OR MODIFY the correspondence or transmission they've been entrusted to carry?
If the US postal service opened your mail and scribbled out sections of your letters, would you still feel so copacetic about things? I know I wouldn't....
This is a step towards being subjugated exactly like China.
Step 1) Comcast imposes "totally legal" restrictions on internet traffic.
Step 2) United States Government makes deal with Comcast to be sole provider for govt networks.
Step 3) Congress passes legislation to help put other providers out of business.
Step 4) Comcast becomes primary provider in US.
Step 5) Government officials give kickbacks to Comcast to regulate "perfectly legally" what internet traffic is allowed to pass.
Step 6) The US is adopted by a loving family, with an older brother named communist China.
Okay, so it's a stretch.... but this IS the beginning of a violation of rights. There is no shortage of evidence that the constitution was created to protect people from violations such as this, EVEN if you've agreed to it!
Why do you think we don't allowed indentured servitude anymore? It was a contract that was entered into willfully..... The law is there to PROTECT people from jackass people/companies like Comcast who try to decide that it's within their rights to violate peoples' rights, just because the law says they can.
To quote the declaration of independence.
This is exactly a situation where if what Comcast is doing is "legal" it's time to enact some legislation to ensure that this kind of completely unethical behavior (which SHOULD be illegal) never happens again.
The law is(read: SHOULD BE) there to protect you and me, not big business. We have a congress, and not a king, for just this sort of situation.
Help me Obi-wan Kenobi(read: voters of the USA). You're my only hope.
Parent
Re:Encryption (Score:5, Informative)
encryption is useless in this case, however, since bittorrent traffic is obvious to an intelligent packet shaper such as the Sandvine systems that Comcast uses. Bittorrent usage generates a very distinctive signature even if you just look at the volume ant timing of packets. Once it figures out you're using bittorrent, it just needs to send the RST packet, which will have the same effect regardless of encryption: Your client will think that the remote peer closed the connection.
Parent
Re:Encryption (Score:4, Informative)
Parent
Not just P2P traffic (Score:5, Informative)
I've posted this before, but it's pertinent and bears repeating, it's not just P2P traffic that Comcast is filtering. A sysadmin I know has been blogging on Comcast filtering corporate e-mail traffic as well.
http://kkanarski.blogspot.com/2007/09/comcast-filtering-lotus-notes-update.html [blogspot.com]
Subtitled: How To Lose Your Customers To DSL (Score:4, Insightful)
Re:Subtitled: How To Lose Your Customers To DSL (Score:5, Informative)
Comcast has decided that p2p degrades their system, for them it's more of a technical issue than a political one (though I'm sure the **AA Gestapo have been in touch with them).
Parent
Title Inapt (Score:5, Insightful)
Registering legitimate files (Score:4, Interesting)
Fix to comcast. (Score:5, Informative)
Almost all up to date bittorrent clients support this.
Doesn't the very act of policing content (Score:5, Interesting)
"Hello, RIAA. I have reason to believe Comcast is allowing illegal music trafficking to occur."
It's Comcastic!
Comcast... Where? (Score:5, Insightful)
I'm outraged! (Score:5, Funny)
On the other hand... (Score:4, Funny)
Question.... (Score:4, Informative)
1. What hardware/software would carriers have to use to do this?
2. Can it be defeated?
Fwiw, Rogers cable in Canada is rumored to be doing the same thing (and perhaps more). Michael Geist talks about this on his blog: http://www.michaelgeist.ca/content/view/1859/ [michaelgeist.ca]
Re:Question.... (Score:4, Informative)
Actually, Canadian users should file a complaint about Rogers misleading advertising with the Competition Bureau (not advising purchasers of their high speed service in their advertising that they will lower the speed of P2P apps). I have, and so have others. It really is a question or priorities and complaint volume though, and at present the number of complaints has been very few.
For anyone interested, the Competition Act [canlii.org] and there are numerous sections dealing with misleading advertising. By not advising they public they are actually reducing the speed of P2P apps, they are knowingly making a material misrepresentation to the public (Parts VI and VII.1).
You can file complaints with the Canadian Competition Bureau about Rogers, here [competitionbureau.gc.ca].
Parent
What would be nice (Score:5, Interesting)
However, I would love to see stats on what percentage of their users actually use bittorrent. Until someone can prove that more than 1% use it, they can use that argument and 85% of people will shout"Yeah, more bandwidth for me, screw those pirates", without realizing the legitimate torrent uses (such as linux distro rollouts, patches as mentioned before, media defender email leaks, etc).
At leas the media is finally catching on, but until we get people to realizing that it is a slippery slope that affects them, there will not be enough uproar to stop them.
So, if we could only get our hands on how many people use it... we might be able to make some noise. Until then, the average joe will say "So What?"
Re:What would be nice (Score:4, Insightful)
Correction... they throttle in order to get the 15% back and resell it to more users, without having to upgrade existing infrastructure.
Parent
Legal action? (Score:4, Interesting)
On one hand, they're deliberately pretending to be the person you're communicating with (fraud?). On the other they're deliberately degrading performance of a person's internet connection (vaguely DOS-ish), a person one who isn't necessarily their customer.
Thoughts?
I don't think this is all Comcast discriminates... (Score:4, Interesting)
BTW, This has gotten worse ever since Comcast started offering VoIP.
Sending spoofed packets (Score:4, Interesting)
I just can't believe that somewhere along the lines there hasn't been a law made that makes spoofing illegal, they are claiming to be someone/something else to which you have agreed to communicate with.
Of course, if its not actually sending packets as if they came from the peer, then its a different story.
This may have been considered already, but... (Score:4, Informative)
I recall that in the Early Days of the Internet, not abiding by the RFCs would get you in hot water. Especially screwing up with SMTP would do it, but even bad behaviour due to your incompetence would get your T-1 unclocked, and it would take a few calls to the powers that be to assure them that you found someone who knew what they were doing and that problem wouldn't occur again. At least not for a while.
My point is, perhaps it's time for the other Internet providers to consider requiring Comcast to not mess with traffic in this way, or sanction Comcast.
Sanctions could be as graduated as throttling at the NAPs, degrading Comcast traffic, even disconnects.
Some providers have a stake in this. If the legal Bitorrent users (WoW for instance) get a crossed hair over this, why would they not ask their providers to pressure Comcast into stopping this?
Ultimately, this may be Comcast clinging to their ToS and 'server' restrictions, and that would mean Comcast users won't be sharing out Bitorrent files. Bummer.
Another wrinkle, I wonder if Comcast sends forged RSTs to Comcast users sharing with *other* Comcast users. Intranetwork traffic shouldn't 'cost' so much for Comcast.
My theory is simple - Imagine if ISPs started throttling or denying traffic from Akamai, because of the volume... What a mess. And while Bitorrent is used for all sorts of purposes, so is SMTP. So if they think the illegal use of Bitorrent is sufficient excuse for them to deny it, why don't they throttle/deny SMTP, since simple spam is bad enough, but the emails of worms/trojans/scams also are objectionable. even arguably illegal. And certainly harmful, to users and the Internet. Maybe even Comcast.
Of course, that's not the point. Comcast is trying to avoid costs due to the volume of Bitorrent traffic that leaves them paying for NAP ports, lines to other ISPs, and routers/switches to manage all this.
In other words, they are trying to control costs by controlling usage.
One of the reasons I got out of the business pre-2000. Couldn't make a profit with my business model. Network costs were too high.
Well, another option is to surcharge high-volume users. Or charge more to afford to provide the service ostensibly advertised.
It's not often I can be happy to have Cox Cable. My Qwest DSL before just sucked, but the traffic got through.
Good luck. My bet is the best avenue is a class-action over either false advertising or Magnuson-Moss.
Comcast != Common Carrier (Score:4, Informative)
Parent
Re:Comcast != Common Carrier (Score:5, Informative)
There's not a whole lot of equipment that sends them, but pretty much every OS I've come across honors the messages to some extent. I don't know if the cheap NAT routers that many people use pass them along or not, though NAT in general tends to be fairly broken when it comes to ICMP.
If a man in the middle were to spoof ICMP source quench packets that looked like they came from either of the p2p nodes that were communicating, the effect would be that they would start sending data more slowly to each other. The connection would still be open, they just wouldn't transmit as fast as they could.
After reading the article it became clear that what Comcast is doing is much more evil. They're setting RST flags on packets (or maybe spoofing new packets in the right segment range with it set), which causes the entire connection to abort rather than just be slowed down. It could cause a lot of grief if their filter misidentifies something as p2p and starts shutting down the connections, as apparently happens to Lotus Notes [blogspot.com] traffic.
That last link has some good packet dumps of it happening.
Parent
Re:Common carrier (Score:4, Insightful)
Parent
Re:Common Carrier (Score:5, Informative)
From wikipedia [wikipedia.org]: "Internet Service Providers generally wish to avoid being classified as a "common carrier" and, so far, have managed to do so. Before 1996, such classification could be helpful in defending a monopolistic position, but the main focus of policy has been on competition, so "common carrier" status has little value for ISPs, while carrying obligations they would rather avoid. The key FCC Order on this point is: IN RE FEDERAL-STATE JOINT BOARD ON UNIVERSAL SERVICE, 13 FCC Rcd. 11501 (1998), which holds that ISP service (both "retail" and backbone) is an "information service" (not subject to common carrier obligations) rather than a "telecommunications service" (which might be classified as "common carriage")."
Parent
Re:Yea, right (Score:5, Insightful)
Parent
Re:Yea, right (Score:5, Insightful)
- Offer a huge bandwidth that most people won't use
- Some will use it, costing us more than we charge, but that's overwhelmed by increased business by people who want the bandwidth from the ad while not actually using it
But then this happens:
- Whoops! File sharing is a Killer App that many people are using.
- On average we are now losing money.
Of course, the proper course of action is to alter their contracts (after the current ones expire) to charge more money for more use, perhaps in various rates. Yes, that will drive people to other companies who don't do this...who will also lose money.
Let the market figure it out.
Anyway, wouldn't generating fake signals to alter the operation of your applications be illegal? That's above and beyond throttling or blocking (gray enough as it is.)
Parent
[citation needed] (Score:5, Informative)
Enter P2P, and now there's a lot of data being transferred between the users, with noone paying for it. ... we're all on flat rate, so noone pays. Every 1 MB I download is 1 MB that Blizzard didn't pay for.
But somebody somewhere is uploading that data that's being downloaded. It's not magically coming from nowhere. If the trick is that the cost of bandwidth is supposed to be shouldered by the uploaders, then it's shouldered by the uploaders, and it doesn't matter if it's being downloaded by p2pers or anything.
Which you vaguely get at later in your reply, but this sort of comment is nonsense: "Legal" BitTorrent transfers tend to fall in that category. Someone thought he's smart if he, basically, cheats the ISPs of the bandwidth price. Instead of putting the file on a site and paying for the bandwidth, now he leaves it to a bunch of users that the ISP can't figure out how to bill for it. Nobody posting legal files thinks anything like they're "cheating"! Even if your theory is true, nobody out there knows it, so how could they think they're cheating? They think they're 'spreading the load' somehow. They're using 'available bandwidth' that's not being used for anything.
Then you say:
2. To make things work, paying for the receiving end too was based on oversell and... well, a self-throttling sharing scheme.
Ok then. If all download bandwidth requires corresponding upload bandwidth, and p2p uses "average users'" upload bandwidth, and upload bandwidth for "average users" was oversold... then that means your argument ends up being "broadband vendors oversold bandwidth"! (Just that it's upload bandwidth, not download bandwidth like everyone thinks.)
But this all hinges on a rather bizarre claim about how bandwidth is sold (by upload bandwidth only) that does things like ignore people in the middle... it may be true but your presentation is so sloppy that it doesn't seem trustworthy at all.
You can take it as an example of a problem their own massive oversell created, if it makes you feel any better.
Yeah, gee, I think I'll do that, since that's what your argument boils down to.
Parent
Re:Not that simple (Score:5, Informative)
I appreciate your effort to view all sides of this issue and bring balance to the discussion. Unfortunately your points are utter hogwash.
It's based on the users of bandwidth paying for that bandwidth. How do you explain consumer-only ISPs that don't host content? How do they stay afloat?
Tell me how "flat rate" equates to "noone[sic] pays". ISPs charge the cost of their bandwidth divided by the number of customers, plus a little on top for their operations.
Keep in mind that all connections have bandwidth limits, and most have monthly transfer limits. (The latter should be treated as fraud by the courts; ISPs love to shout "unlimited!" in their advertisements. But that's a separate discussion.) If you start transferring a lot, uploading or downloading, you have to get a higher-priced account or pay for the extra data transferred a la carte.
Please. If I am a thoughtless user and I create a giant 10MB dancing hamster video and mail it to my friends, and they start forwarding it around, am I "cheating the ISPs"? (Collectively, by the way... since when does everyone have to start considering the welfare of every business out there? What happened to capitalism?) The ISPs absolutely can figure out how to bill for it: charge by connection time or by quantity of data transferred. Look at business accounts; they have detailed billing for "burst" and "sustained" transfers, transfer limits, and more. What they can't figure out is how to avoid getting hoist by their own petard, after they made fun of AOL for those practices, and then repeated AOL's mistakes.
So what are those "max connections" and "max bandwidth" settings I've seen in every BitTorrent client I've ever used?
We're in agreement there. But why does your unbiased simple explanation contain numerous factual inaccuracies which all back up the terrible business practices and fraud of the ISPs?
Parent
Re:ha (Score:4, Interesting)
Parent
Re:LOL (Score:5, Insightful)
Then when the people we use as an alternative to Comcast start to mess with us, just
DROP them too.
My choices are literally dial-up, Comcast, or nothing. And dial-up and nothing aren't really options because I often have to VPN into my office from home.
Ah yes, simple market response. I can choose any broadband provider I want, as long as it's Comcast.
Parent
Re:LOL (Score:5, Funny)
Nothing says you hate a service more than if you were to rip up the foundation of your life, career, and family just to avoid them.
Parent
Re:LOL (Score:5, Informative)
Parent
Re:you know ... (Score:5, Insightful)
Parent
Re:you know ... (Score:5, Interesting)
AT&T has tried to sneak in some fiber into the area (Project Lightspeed), but continues to run into problems with deals local governments sign with Comcast. Namely, a $300k fee that villages charge new service providers and the requirement that telecom companies provide some sort of local service (i.e., local government access channels). AT&T says they're a utility and shouldn't have to pay that fee.
If Motorola's WiMAX manages to do something, they may be an option in the mid-term future. I'm not holding my breath.
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Re:you know ... (Score:5, Funny)
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Re:LOL (Score:5, Insightful)
Comcast thrives in broadband because in many regions it is your only choice. You can't get alternative cable modem ISPs and DLS is not always available. Market forces are unlikly to effect them much.
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Re:ha (Score:5, Informative)
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