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story category Some ISP Users Struggle To Reach Google
Are problems related to Comcast traffic shaping?
(old news - 12:07PM Tuesday Oct 30 2007)
tags: business · content · networking · Comcast · AT&T DSL Service · SONIC.NET
Tipped by Mike See Profile
Users in our Comcast forum over the last several weeks have been reporting some difficulty getting Google to load properly. Users at Slashdot automatically tie the problem to Comcast traffic shaping, highlighting a Something Awful thread which suggests that the Sandvine gear Comcast uses to send injected fake RSTs (in order to limit BitTorrent upstream bandwidth consumption) is somehow disrupting Google connectivity:
Click for full size
What you are seeing here is this: me refreshing "http://www.google.com" in Firefox 2.0.0.8, then 10 seconds later me refreshing "http://shsc.info/ShscWiki". The full capture can be downloaded here. Notice the TCP RSTs in the first transaction, and the smooth sailing of the second. The entire rest of the internet works fine except Google, and this is happening on 2 Windows XP systems, one Vista laptop, and my friggen iPhone. During this, I am continuing to run torrents which are not visible due to a capture filter of "tcp port 80" during this capture.
However, we've seen similar complaints from AT&T and other ISP users over the last few months, indicating it could be Google's problem. Back in September, Google experienced some significant DNS problems that affected multiple ISPs, though we never saw an official explanation. We've fired off an e-mail to Google to see if the current problems are related, or if this is indeed the result of Comcast traffic shaping.

Related:
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  2. NY Attorney General Investigating Comcast
  3. Comcast To Launch Online Backup Service
  4. Still Waiting On Faster AT&T Speeds, Line Bonding
  5. ISPs Distance Themselves From British Telecom
  6. Cable Cooking Up New Network Management System
  7. Google Starts Discussion About Speeding Things Up
  8. Rogers Still Injecting Content Over Sites
Forums » Some ISP Users Struggle To Reach Google
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justbits
More fiber than ATT can handle
Premium
join:2003-01-08
Chicago, IL
·AT&T Midwest
·AT&T Yahoo


1 edit

Notes

In a few instances, users switching from Wireless WPA/WPA2 AES encryption to WPA/WPA2 TKIP encryption had the problem go away.

»www.google.com/ produces gzip compressed web pages from a server advertising itself as HTTP 1.0.

Mike
Premium,Mod
join:2000-09-17
Pittsburgh, PA
clubs:

Re: Notes

I'm also interested in seeing what Google's response (if any) will be.

supergirl

join:2007-03-20
Pensacola, FL
·Cox VOIP
·Skype
·Cox HSI
·AT&T Southeast
·magicjack.com

Now, that would be stupid to block Google. No trouble pulling up Google, YouTube or Gmail on Cox HSI. YouTube sometimes does load longer than usual but that is because 50 million people are on it.

Google is working on server upgrades and routing traffic all the time so it could be something they are doing.

If you are logged out of iGoogle and YouTube, I found it loads faster.
--
Saving the world keeps me busy. However, I find Earth very primitive from my home planet of Krypton.
-Supergirl

dddane

join:2002-01-10
Chicago, IL


1 edit

who to blame

we haven't been able to load youtube here at work, and it's not because it's restricted. it's not that youtube isn't loading, but it's very very slow to the point where you might think it's not loading if you're not patient. (though google works fine... so i'm sure it's of no relationship).

we've had the routes checked and it was determined to be a routing issue past our 1st level provider and in cogent's route to google. we contacted google and cogent but they haven't fixed it. it's been 3 or 4 weeks now.

S_engineer

join:2007-05-16
Chicago, IL
·Comcast

Re: who to blame

The site itself takes awhile to load for me, I don't view youtube. Is this a regional issue?
I thought it was just me...nice to know it's not on my end, but now I have the daily item to add to the Comcrap bitch list.
--
Where have the adults gone?

dddane

join:2002-01-10
Chicago, IL

Re: who to blame

my connection @ work actually goes out to the 'net in NY via ATDN (ATDN has diagnosed it as cogent issue)...

so if it is regional it's a wide region, if it's the same issue..

though the particular issue w/ comcast seems unrelated
JSRoman
Premium
join:2005-03-10
Callahan, FL

1 edit

My brakes are squeaking.

Damn you Comcast!

EverAndAnon

@verizon.net

Re: My brakes are squeaking.

But it's so much more fun to blame Comcast... for everything. (which is true about everyone who does something incredibly stupid--as opposed to for those things that are only a little stupid [which is something everyone does at least once every day])

Rob
In Deo speramus, God Bless the USA
Premium
join:2001-08-25
Kendall, FL
·Comcast

My Microwave doesn't work!

Guess what?! The same time that I couldn't access Google, my microwave stopped working. I bet it was Comcast. You can never trust them. I bet they are blocking my microwave waves from heating up my food.

I wouldn't be surprised if next week they start calling me to sell me their own rebranded Microwave.

Mike
Premium,Mod
join:2000-09-17
Pittsburgh, PA
clubs:

Re: My Microwave doesn't work!

It's Cookcastic?
salahx

join:2001-12-03
Saint Louis, MO

Comcast has been accused of pretty much everything - subscribe to their service; and they rape your cat, eat your spouse, giving you a general feeling of malaise around poultry, etc.

The brought this suspicion upon themselves though. Unfortunately that's what you get when you start messing around with packets, you can now never be sure if it Comcast doing it or not.
Ahrenl

join:2004-10-26
North Andover, MA

Re: My Microwave doesn't work!

That's why my cat has been walking around funny... {shakes fist at comcast}

ptrowski
Got Helix?
Premium
join:2005-03-14
Putnam, CT
clubs:
·VOIPo
·Metrocast Communic..
·AT&T DSL Service
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said by salahx See Profile :

Comcast has been accused of pretty much everything - subscribe to their service; and they rape your cat, eat your spouse, giving you a general feeling of malaise around poultry, etc.

The brought this suspicion upon themselves though. Unfortunately that's what you get when you start messing around with packets, you can now never be sure if it Comcast doing it or not.
My gum lost it's flavor way too soon today. Damned you to hell, Comcast!!!!!!!!!!
--
"A religious war is like children fighting over who has the strongest imaginary friend."

Have you been touched by his noodly appendage? »www.venganza.org

swhx7
Premium
join:2006-07-23
Elbonia
·RoadRunner Cable

Re: My Microwave doesn't work!

You guys are making fun of complaints against Comcast, but this shows the price they pay.

With other ISPs, problems like this would be attributed to random glitches. But now that Comcast is known for interfering with users' communications, it will be only natural for people to suspect tampering when something goes wrong. It's their own fault they earned this reputation.
lordofwhee

join:2007-10-21
Everett, WA

Re: My Microwave doesn't work!

They deserve this reputation, even if it IS false.

Screwing with people's connections in a way such as this and then lying about it just isn't right.

Oh, and for everyone who says "if you don't like it, don't use it," CC has a monopoly on my area. I can't get DSL (out in the middle of nowhere), and I'm sure as hell not using dial-up. CC is the only realistic option, despite how much I hate them.

FiOS plox.

LeftOfSanity

join:2005-11-06
Felton, DE

Re: My Microwave doesn't work!

said by lordofwhee See Profile :

They deserve this reputation, even if it IS false.

Screwing with people's connections in a way such as this and then lying about it just isn't right.

Oh, and for everyone who says "if you don't like it, don't use it," CC has a monopoly on my area. I can't get DSL (out in the middle of nowhere), and I'm sure as hell not using dial-up. CC is the only realistic option, despite how much I hate them.

FiOS plox.
So its Comcast's fault they are your only provider? Why not bitch at you telco DSL because they DON'T offer service in your are. Thats people today.."What? Your the only one to offer me a service I otherwise wouldn't be able to get? Damn You!"
Ahrenl

join:2004-10-26
North Andover, MA
This is no laughing matter! My cat won't even lick his own ass anymore!!
fiberguy
My views are my own.
Premium
join:2005-05-20

Back in 1995, I remember the company being accused, by a female subscriber, that it was "Comcast's fault her husband wasn't having sex with her anymore"... TRUE STORY... I was part of that incident being I was in the security department. The things you hear..
--
"Complaining is the least path of resistance for the self-serving, the lazy, and I’m told it’s a woman’s prerogative..."

Pashune
Inhaling at 410 KB per sec.
Premium
join:2006-04-14
Gautier, MS

Aye...

Comcast is at it again....or is it Google?

Who knows...
Tavio2

join:2003-01-16
La Canada Flintridge, CA

Interesting...

I have a customer experiencing the same issue who has AT&T DSL Service in the Southern California area.... switched to the new AT&T DNS servers, and problem persists...

Jerm

join:2000-04-10
Richland, WA

Re: Interesting...

"Experiencing the same issue"

Well the customer may be having issues, but I doubt he's seeing RST packets like the example above.

outspoken72
An Irish Jayhawk
Premium
join:2000-10-03

annoying as....?

"Where's my latte"
--
I am Specialized!

Richard B
Fur It Up

join:2007-06-22
Portland, OR
·Comcast

Comcast

You guy trust something Awful as a source of news. Gentlemen we have a new Broadband Reports low. Get a hint folks; if your scraping below the bottom of the barrel it is a HINT to move on. You are losing creditability fast.

Oh yes I did have problem reaching Google and a few other sites weeks ago, it was a bad router on Comcast network

nekkidtruth
You fail at life.
Premium
join:2002-05-20
London, ON
·Rogers Hi-Speed

Re: Comcast

From someone who's been around what? Barely 4 months?

Your opinion is hardly worth the screen it's been typed on. Just to prove my point...

Please show us exactly how DSLR has lost credibility.

Please show us how this news is bottom of the barrel.

Please explain how your opinion is fact.

Good luck.
--
Weeeeeee

N3OGH
Bear patrol must be working like a charm
Premium
join:2003-11-11
Philly burbs
·Verizon Online DSL

Re: Comcast

said by nekkidtruth See Profile :

Please explain how your opinion is fact.
He didn't say his opinion is fact, he simply stated his opinion.

As long as he's on topic and not making a personal attack, I think he entitled to it.

I think he's wrong, but that's another point..
--
Petty people are disproportionably corrupted by petty power…

Richard B
Fur It Up

join:2007-06-22
Portland, OR
·Comcast

One I do not have to prove jack to you
two I been around for four years I only been posting under this account for four months.

I remember this place was called DSL report. It was about broadband now it seem the political crusade of the day.

Oh yes argument Ad hominem just ant way saying I can not counter you arguments.

anony101

@comcast.net

Re: Comcast

said by Richard B See Profile :

One I do not have to prove jack to you
two I been around for four years I only been posting under this account for four months.

I remember this place was called DSL report. It was about broadband now it seem the political crusade of the day.

Oh yes argument Ad hominem just ant way saying I can not counter you arguments.
If you're going to make statements like that you'd better show some evidence to back them up or you will lose all credibility.

KrK
Heavy Artillery For The Little Guy
Premium
join:2000-01-17
Tulsa, OK
We need some Broadband crusades.... because it's sure not in a hurry to improve otherwise.
AquaBlaze
Premium
join:2004-02-02
Encino, CA

Re: Comcast

said by KrK See Profile :

We need some Broadband crusades.... because it's sure not in a hurry to improve otherwise.
Nah. We just need some flash games or cartoons pasted on the borders of the site. That should quench those posters who don't find news exciting enough.

sporkme
drop the crantini and move it, sister
Premium,MVM
join:2000-07-01
Morristown, NJ
·Optimum Online

said by Richard B See Profile :

You guy trust something Awful as a source of news. Gentlemen we have a new Broadband Reports low. Get a hint folks; if your scraping below the bottom of the barrel it is a HINT to move on. You are losing creditability fast.
Did you even read the thread? The analysis was not that far-fetched.

Tell me, where do you think the RSTs are coming from? If you look at the sequence it looks suspicious. More RSTs than necessary followed by what appear to be real RSTs after the sandvine RSTs.
AquaBlaze
Premium
join:2004-02-02
Encino, CA

said by Richard B See Profile :

Gentlemen we have a new Broadband Reports low. Get a hint folks; if your scraping below the bottom of the barrel it is a HINT to move on. You are losing creditability fast.
Umm...it is called BroadbandReports for a reason. If broadband-related news isn't your cup of tea, then I suggest you find a different forum.

However, if the presentation just doesn't meet your ADD news-quenching needs, then may I suggest Fox News. They're damn good at making every little thing seem like a high-graphic struggle of life & death.

DC DSL
Stays crunchy even in milk
Premium
join:2000-07-30
Washington, DC
·Covad Communications
·Verizon Online DSL

I doubt it's something nefarious

I have noticed some extremely slow loads from results (particularly cached pages) for several weeks now. Since it's happening to me and my clients on Verizon or Covad wire and VZ, Cov, or OpenDNS routing, I seriously doubt it's traffic shaping by any one ISP. Most likely, it's something gone wrong in the Googleversetinuum™.
moonpuppy

join:2000-08-21
Glen Burnie, MD
·Verizon Online DSL

Let's wait and see.....

If it were only Comcast users, we could get the torches ready but since ATT and other ISPs are having issues, it sounds either Google, or their ISP, is having issues or we found more customers of Sandvine.
tkdslr

join:2004-04-24
Pompano Beach, FL
·Speakeasy

There might be another explanation.. Microsoft evilness.

M$ built into XP and Vista, a custom DNS client.

I would not be surprised if one of the M$ updates changed something to give the evil empire some sort of advantage. Perhaps one of those stealth updates??

It takes a bit of effort to shut it off.
Startup->Control panel->Administrative tools->Services.
Disable DNS client startup and stop the existing service.

Once the DNS client service is shutdown, DNS resolution behaves like a typical WinXXXX/UNIX system.
jctune

join:2006-09-14
Denver, CO

Re: There might be another explanation.. Microsoft evilness.

Not Microsoft - I have the same problem on multiple Mac OSX machines.

Google disappears in the late evening - and yes - I do have Comcast.

morbo
Complete Your Transaction

join:2002-01-22
00000
clubs:

cloud of uncertainty

comcast may not be the cause of this problem or if they are, it may be a complete accident.

HOWEVER, they are the ultimate cause of the stir because of their outright lying about traffic shaping.

dodgetech2

join:2002-01-01
Gouldsboro, PA
·ProLog
·Vonage

Re: cloud of uncertainty

said by morbo See Profile :

HOWEVER, they are the ultimate cause of the stir because of their outright lying about traffic shaping.
You can say that again..:)

Rick
Premium,MVM
join:2001-02-06
Waterbury, CT
clubs:

Apparently the user is bringing the problems on themselves..

"During this, I am continuing to run torrents which are not visible due"

Running servers is against the TOS of Comcast.
Why people continually do what is clearly banned and then complain about whatever might result from it is way beyond my comprehension.

Undoubtedly..the user is also someone downloading/uploading 400 gigs a month and ruining the service for the rest of those in their neighborhood as well.

All the while, i'm sure they're complaining about it all..and the fact they are even having to pay 42.95 a month for the service.
--
The Coyote captured the RR! Roadrunner Rick is now Comcastic!

See 36 replies to this post

exocet_cm
Support Your FOP - Crescent Lodge No2
Premium
join:2003-03-23
New Orleans, LA
clubs:

Been having a problem

With POP and SMTP with Google. Using Cox communications if that helps any
KraziJoe

join:2006-09-08
Alexandria, VA

Re: Been having a problem

I think the sky is falling...

exocet_cm
Support Your FOP - Crescent Lodge No2
Premium
join:2003-03-23
New Orleans, LA
clubs:
·Cox HSI
·Suddenlink
·Cingular Wireless
·AT&T Southeast
·Charter Pipeline
·Network Telephone ..

Re: Been having a problem

said by KraziJoe See Profile :

I think the sky is falling...
Me too, a big Google conspiracy if you ask me

Nah, I've been having a problem with Google for weeks now, and I think this whole traffic shaping thing is BS. I think Google just has some problems on their end that haven't been addressed yet.
--
"I have measured out my life with coffee spoons..." - T.S Eliot
Check Out the Tech Bench »johnball.wordpress.com/tech-bench/
Ma blog: »www.johndball.com

imatripandahalf

@covad.net

So thats whats happening!

I have google as my homepage and it was going out every single night at the same time! I thought it was just me!.. Maybe google should sue comcast for not allowing people access their site

DOStradamus
MVM
join:2003-11-04
Santa Rosa, CA

This Parallels Something AOL Was Doing Ten Years Ago.....

Any 90's era DHTML vetrans remember how over-aggressively AOL would cache www content, so it could serve its subscribers stale pages from its own caching proxies?

Deja vu! Google's first "line of defense" in keeping all the traffic hitting www.google.com flowing smoothly, is apparently being done at the DNS level. Right at the start, if you "ping www.google.com" you're using the first of 4 shuffled IP addresses your DNS server is supplied with when you ask it "what IP address does www.google.com point to":

That's apparently group "L", so there's probably 11 other sets of four, maybe more.

WORTH NOTING: Each of those four expire in 131 seconds, meaning, those are supposed to be flushed from my DNS' cache after that, a subsequent query will force it to "get off its ass" and ask Google again.

Enter Comcast. Their DNS servers are so f(reak)ing "lazy", if a domain (www.karels.org, for one) is not in their cache, it won't even bother to look it up. Mix that with what Google does, and guess what!

-NK

dddane

join:2002-01-10
Chicago, IL

Re: This Parallels Something AOL Was Doing Ten Years Ago.....

pretty much any major web site will have round robin servers set up in DNS like this... this inheritantly causes no problems, and really has no bearing on whether the page you get is cached or not...

if what you're saying about comcasts' dns servers not looking up entries it doesn't know, that's pretty pathetic on their part and i'm not sure why anyone would do business with them if they had a choice.

GemSnake
Premium
join:2000-10-19
3rd layer
clubs:

This is not a problem. www CNAME has a 7-day TTL.

www.google.com. 7D www.l.google.com.

Web farm for www.l.google.com has TTL of 5 mins. If they need to swap out a box from the farm, propagation will take 5 mins. That's all there's to it. Yahoo web farm has TTL of 1 mins, for example.
--
"In a fight between you and the world, bet on the world." - Franz Kafka
madrhino

join:2004-07-03
·Verizon FIOS
·Comcast


1 edit

Is every request being blocked?

Is every request from Comcast to Google being blocked or just selected inquiries?Maybe Google is starting to block torrent related inquiries so the Lords of the **AAs( and their pet Congress) don't attack them next.
--
Get Verizon FIOS,The Anti-DIOS

Phylop
Premium
join:2002-11-17
Reston, VA

Gmail.

I have noticed that logging in to my Gmail account has been taking much, much longer than normal, and sometimes google searches are slower.

dallash
Premium
join:2001-08-17
Little Rock, AR
clubs:
·Vonage
·Comcast

Blame Comcast

I guess every little thing that looks out of place will cause everyone to jump on the "blame Comcast" bandwagon.

I guess they asked for it with their sneaky traffic-shaping.

That being said, if I caught some loser stealing copyrighted material on one of our connections, and I had a Sandvine box that could degrade his traffic, I would let loose on him.

We're a WISP, and these "something for nothing" mentality losers would be the death of our network. (yes, I'm talking to you, BT thieves)

That's why when we catch someone cooking their connection, we politely ask them to stop before we jerk their connection out from under them.
NormanS
Premium,MVM
join:2001-02-14
San Jose, CA
·Pacific Bell - SBC

Re: Blame Comcast

said by dallash See Profile :

That being said, if I caught some loser stealing copyrighted material on one of our connections, and I had a Sandvine box that could degrade his traffic, I would let loose on him.
How can you know that downloading copyrighted material is theft? If somebody has paid an authorized publisher of the copyrighted material, then it isn't theft. If somebody is downloading copyrighted material under a distribution license similar to GNU, then it isn't theft. So how do you discriminate between authorized, and unauthorized downloading?
--
Norman
~Oh Lord, why have you come
~To Konnyu, with the Lion and the Drum

dallash
Premium
join:2001-08-17
Little Rock, AR
clubs:

Re: Blame Comcast

It's easy Norman.

Looking at a bandwidth graph, an obviously unattended, pegged connection is a telltale sign.

Dallas
NormanS
Premium,MVM
join:2001-02-14
San Jose, CA
·Pacific Bell - SBC

Re: Blame Comcast

I am certainly happy that you aren't a cop, and I certainly would toss you from the jury pool, if I was in a position to do so.

A "pegged" download graph only proves that the downloader is saturating the bandwidth. It has no relation to whether the content being downloaded is "infringing", or not.
--
Norman
~Oh Lord, why have you come
~To Konnyu, with the Lion and the Drum
tdumaine

join:2004-03-14
Redmond, WA
·Comcast

Wow Rick...

said by Rick See Profile :

"During this, I am continuing to run torrents which are not visible due"

Running servers is against the TOS of Comcast.
Why people continually do what is clearly banned and then complain about whatever might result from it is way beyond my comprehension.

Undoubtedly..the user is also someone downloading/uploading 400 gigs a month and ruining the service for the rest of those in their neighborhood as well.

All the while, i'm sure they're complaining about it all..and the fact they are even having to pay 42.95 a month for the service.
Better get your nose out of comcasts ass. You have it so far up there, no more air is getting thru...
lordofwhee

join:2007-10-21
Everett, WA

Re: Wow Rick...

Ignore him, he basically lives off making posts like that one.
Forums » Some ISP Users Struggle To Reach Googlepage: 1 · 2


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