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WiFi Mystery

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  WiFi Mystery Davoud <star@sky.net> - 2015-04-22 23:11 -0400
    Re: WiFi Mystery jamiekg@wizardling.geek.nz (Jamie Kahn Genet) - 2015-04-23 18:01 +1200
    Re: WiFi Mystery Kevin McMurtrie <mcmurtrie@pixelmemory.us> - 2015-04-22 23:03 -0700
      Re: WiFi Mystery Davoud <star@sky.net> - 2015-04-23 11:52 -0400
        Re: WiFi Mystery Warren Oates <warren.oates@gmail.com> - 2015-04-23 12:40 -0400
          Re: WiFi Mystery Patty Winter <patty1@wintertime.com> - 2015-04-23 18:28 +0000
          Re: WiFi Mystery Davoud <star@sky.net> - 2015-04-23 15:06 -0400
            Re: WiFi Mystery JF Mezei <jfmezei.spamnot@vaxination.ca> - 2015-04-23 15:31 -0400
        Re: WiFi Mystery David Ritz <dritz@mindspring.com> - 2015-04-23 11:41 -0500
          Re: WiFi Mystery Davoud <star@sky.net> - 2015-04-23 15:08 -0400
            Re: WiFi Mystery David Fritzinger <email@domain.com> - 2015-04-23 16:13 -0400
        Re: WiFi Mystery Barry Margolin <barmar@alum.mit.edu> - 2015-04-23 16:17 -0400
          Re: WiFi Mystery Kevin McMurtrie <mcmurtrie@pixelmemory.us> - 2015-04-26 20:31 -0700

#73961 — WiFi Mystery

I'm taking a Coursera MOOC. Two days ago the Coursera web site began
loading very slowly or not at all. Tried several browsers in OSX (all
latest software) on four different Macs, one of which has direct
Ethernet to the Verizon router, and in Windows 7 Pro, with the same
results. Rebooted my Verizon router with unplug-wait-replug. Restarted
my AirPort Base stations, all to no avail. Tried several Macs, one of
which has Ethernet direct to the Verizon router. Still no good.

*All* other web sites I have tried load normally. Streaming video is
smooth and fast.

Must be something about the Coursera web site, right?

Wrong. Tonight it occurred to me to try my Verizon JetPack 4G LTE
wireless device. The Coursera web site loads quickly. Streaming video
lectures, which won't load at all on my home network, work fine. Switch
back to the home network and the Coursera site grinds to a halt again.

What in my network could be choking a single web site?

TIA!

-- 
I agree with almost everything that you have said and almost everything that
you will say in your entire life.

usenet *at* davidillig dawt cawm

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#73963

Davoud <star@sky.net> wrote:

> I'm taking a Coursera MOOC. Two days ago the Coursera web site began
> loading very slowly or not at all. Tried several browsers in OSX (all
> latest software) on four different Macs, one of which has direct
> Ethernet to the Verizon router, and in Windows 7 Pro, with the same
> results. Rebooted my Verizon router with unplug-wait-replug. Restarted
> my AirPort Base stations, all to no avail. Tried several Macs, one of
> which has Ethernet direct to the Verizon router. Still no good.
> 
> *All* other web sites I have tried load normally. Streaming video is
> smooth and fast.
> 
> Must be something about the Coursera web site, right?
> 
> Wrong. Tonight it occurred to me to try my Verizon JetPack 4G LTE
> wireless device. The Coursera web site loads quickly. Streaming video
> lectures, which won't load at all on my home network, work fine. Switch
> back to the home network and the Coursera site grinds to a halt again.
> 
> What in my network could be choking a single web site?
> 
> TIA!

DNS issue?
-- 
If you're not part of the solution, you're part of the precipitate.

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#73964

In article <220420152311434367%star@sky.net>, Davoud <star@sky.net> 
wrote:

> I'm taking a Coursera MOOC. Two days ago the Coursera web site began
> loading very slowly or not at all. Tried several browsers in OSX (all
> latest software) on four different Macs, one of which has direct
> Ethernet to the Verizon router, and in Windows 7 Pro, with the same
> results. Rebooted my Verizon router with unplug-wait-replug. Restarted
> my AirPort Base stations, all to no avail. Tried several Macs, one of
> which has Ethernet direct to the Verizon router. Still no good.
> 
> *All* other web sites I have tried load normally. Streaming video is
> smooth and fast.
> 
> Must be something about the Coursera web site, right?
> 
> Wrong. Tonight it occurred to me to try my Verizon JetPack 4G LTE
> wireless device. The Coursera web site loads quickly. Streaming video
> lectures, which won't load at all on my home network, work fine. Switch
> back to the home network and the Coursera site grinds to a halt again.
> 
> What in my network could be choking a single web site?
> 
> TIA!

Probably an Internet peering dispute about who should pay whom money 
when there's two-way usage.  If one peer thinks another should pay more, 
they switch the peer or some of their data to an intentionally 
overloaded link and claim that money is needed for upgrades.  Try 
comparing traceroutes.

The website appears to be on Amazon EC2 so it could be throttled with 
Netflix as its neighbor.

-- 
I will not see posts from astraweb, theremailer, dizum, or google
because they host Usenet flooders.

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#73967

Davoud:
> > *All* other web sites I have tried load normally. Streaming video is
> > smooth and fast.
> > 
> > Must be something about the Coursera web site, right?
> > 
> > Wrong. Tonight it occurred to me to try my Verizon JetPack 4G LTE
> > wireless device. The Coursera web site loads quickly. Streaming video
> > lectures, which won't load at all on my home network, work fine. Switch
> > back to the home network and the Coursera site grinds to a halt again.

Kevin McMurtrie:
> Probably an Internet peering dispute about who should pay whom money 
> when there's two-way usage.  If one peer thinks another should pay more, 
> they switch the peer or some of their data to an intentionally 
> overloaded link and claim that money is needed for upgrades.  Try 
> comparing traceroutes.
> 
> The website appears to be on Amazon EC2 so it could be throttled with 
> Netflix as its neighbor.

But if it is being throttled at the source, so to speak, why would the
speed be good on my JetPack? The difference is dramatic.

-- 
I agree with almost everything that you have said and almost everything that
you will say in your entire life.

usenet *at* davidillig dawt cawm

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#73968

In article <230420151152370004%star@sky.net>, Davoud <star@sky.net> 
wrote:

> But if it is being throttled at the source, so to speak, why would the
> speed be good on my JetPack? The difference is dramatic.

HTML5 problems? Also, Coursera have had problems with "over-subscribed" 
MOOCs in the past.
-- 
Where's the Vangelis music?
Pris' tongue is sticking out in in the wide shot after Batty has kissed her.
They have put back more tits into the Zhora dressing  room scene.
  -- notes for Blade Runner

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#73973

In article <55392074$0$64024$b1db1813$2411a48f@news.astraweb.com>,
Warren Oates  <warren.oates@gmail.com> wrote:
>In article <230420151152370004%star@sky.net>, Davoud <star@sky.net> 
>wrote:
>
>> But if it is being throttled at the source, so to speak, why would the
>> speed be good on my JetPack? The difference is dramatic.
>
>HTML5 problems? Also, Coursera have had problems with "over-subscribed" 
>MOOCs in the past.

What do you mean? That their servers have gotten overloaded and slow?


Patty

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#73974

Davoud:
> > But if it is being throttled at the source, so to speak, why would the
> > speed be good on my JetPack? The difference is dramatic.

Warren Oates:
> HTML5 problems?

But it's the same computers, just a different WiFi source. For video
lectures one may choose Flash or HTML5. No difference.

> Also, Coursera have had problems with "over-subscribed" 
> MOOCs in the past.

This MOOC, Miracles of Human Language: An Introduction to Linguistics,
from Universiteit Leiden in the Netherlands, began with ~44,000
students from ~190 countries. But the slowdown occurred suddenly, two
days ago, in the fourth week of the course. One can assume that the
number of participants has decreased. And, of course, not all 44,000
were participating in the forums.

-- 
I agree with almost everything that you have said and almost everything that
you will say in your entire life.

usenet *at* davidillig dawt cawm

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#73976

On 15-04-23 15:06, Davoud wrote:

> But it's the same computers, just a different WiFi source. For video
> lectures one may choose Flash or HTML5. No difference.


do a traceroute in both scenarios and see through which networks you go
through.  It is likely you will get totally different routing on your
wireless service than on your wired service.

I your wired service provides inadequate speeds when getting data from
certain site, then change provider. Someone else mentioned your web site
being on same amazon cloud as Netflix and your wired ISP may be
purposefully under provisioning that link.

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#73969

-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA1
NotDashEscaped: You need GnuPG to verify this message

On Thursday, 23 April 2015 11:52 -0400, 
 in article <230420151152370004%star@sky.net>, 
 Davoud <star@sky.net> wrote:

> But if it is being throttled at the source, so to speak, why would 
> the speed be good on my JetPack? The difference is dramatic.

Have you considered disabling all of your browser plug-ins, to see 
whether things pick up?  You can then try enabling them again, one at 
a time, to determine which might be causing the slowdown for the one 
site.

-- 
David Ritz <dritz@mindspring.com>
 Be kind to animals; kiss a shark.

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#73975

Davoud:
> > But if it is being throttled at the source, so to speak, why would 
> > the speed be good on my JetPack? The difference is dramatic.

 David Ritz:
> Have you considered disabling all of your browser plug-ins, to see 
> whether things pick up?  You can then try enabling them again, one at 
> a time, to determine which might be causing the slowdown for the one 
> site.

Once more, the same browsers, with the same plug-ins, work just fine
when the Internet connection comes from my JetPack (which ought to be
slower than my Verizon FIOS connection).

-- 
I agree with almost everything that you have said and almost everything that
you will say in your entire life.

usenet *at* davidillig dawt cawm

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#73978

On 2015-04-23 19:08:36 +0000, Davoud said:

> Davoud:
>>> But if it is being throttled at the source, so to speak, why would
>>> the speed be good on my JetPack? The difference is dramatic.
> 
>  David Ritz:
>> Have you considered disabling all of your browser plug-ins, to see
>> whether things pick up?  You can then try enabling them again, one at
>> a time, to determine which might be causing the slowdown for the one
>> site.
> 
> Once more, the same browsers, with the same plug-ins, work just fine
> when the Internet connection comes from my JetPack (which ought to be
> slower than my Verizon FIOS connection).

As someone else said, it is doubtful that the jetpack is going through 
the same servers as the fios connection. Jetpack is a cellular service, 
while FIOS is a cable (well, actually opticle cable) service. 

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#73979

In article <230420151152370004%star@sky.net>, Davoud <star@sky.net> 
wrote:

> Davoud:
> > > *All* other web sites I have tried load normally. Streaming video is
> > > smooth and fast.
> > > 
> > > Must be something about the Coursera web site, right?
> > > 
> > > Wrong. Tonight it occurred to me to try my Verizon JetPack 4G LTE
> > > wireless device. The Coursera web site loads quickly. Streaming video
> > > lectures, which won't load at all on my home network, work fine. Switch
> > > back to the home network and the Coursera site grinds to a halt again.
> 
> Kevin McMurtrie:
> > Probably an Internet peering dispute about who should pay whom money 
> > when there's two-way usage.  If one peer thinks another should pay more, 
> > they switch the peer or some of their data to an intentionally 
> > overloaded link and claim that money is needed for upgrades.  Try 
> > comparing traceroutes.
> > 
> > The website appears to be on Amazon EC2 so it could be throttled with 
> > Netflix as its neighbor.
> 
> But if it is being throttled at the source, so to speak, why would the
> speed be good on my JetPack? The difference is dramatic.

When you use the JetPack you're going through your 4G provider's 
network, not your ISP.

The problem sounds like a performance issue between the MOOC's ISP and 
your ISP. Kevin's answer was a bit cynical, suggesting that there's a 
financial dispute between them -- sometimes it's just hardware issues or 
the connection is overloaded and they're waiting for new lines to be 
installed.

-- 
Barry Margolin, barmar@alum.mit.edu
Arlington, MA
*** PLEASE post questions in newsgroups, not directly to me ***

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#74274

In article <barmar-2DEA4B.16172023042015@88-209-239-213.giganet.hu>,
 Barry Margolin <barmar@alum.mit.edu> wrote:

> In article <230420151152370004%star@sky.net>, Davoud <star@sky.net> 
> wrote:
> 
> > Davoud:
> > > > *All* other web sites I have tried load normally. Streaming video is
> > > > smooth and fast.
> > > > 
> > > > Must be something about the Coursera web site, right?
> > > > 
> > > > Wrong. Tonight it occurred to me to try my Verizon JetPack 4G LTE
> > > > wireless device. The Coursera web site loads quickly. Streaming video
> > > > lectures, which won't load at all on my home network, work fine. Switch
> > > > back to the home network and the Coursera site grinds to a halt again.
> > 
> > Kevin McMurtrie:
> > > Probably an Internet peering dispute about who should pay whom money 
> > > when there's two-way usage.  If one peer thinks another should pay more, 
> > > they switch the peer or some of their data to an intentionally 
> > > overloaded link and claim that money is needed for upgrades.  Try 
> > > comparing traceroutes.
> > > 
> > > The website appears to be on Amazon EC2 so it could be throttled with 
> > > Netflix as its neighbor.
> > 
> > But if it is being throttled at the source, so to speak, why would the
> > speed be good on my JetPack? The difference is dramatic.
> 
> When you use the JetPack you're going through your 4G provider's 
> network, not your ISP.
> 
> The problem sounds like a performance issue between the MOOC's ISP and 
> your ISP. Kevin's answer was a bit cynical, suggesting that there's a 
> financial dispute between them -- sometimes it's just hardware issues or 
> the connection is overloaded and they're waiting for new lines to be 
> installed.

Unfortunately, I wasn't being cynical.

Netflix has been asking the government to help fix these peering 
disputes that have been going on for at least a decade now.  It started 
out with traffic fee disputes that might be fixed naturally by 
competition.  This was when talk of "paid fast lanes" and "free slow 
lanes" came about.  The government threatened to halt this because it 
was prohibitively expensive for new businesses.  Since Internet and 
entertainment networks have merged into a small number of entities, 
disputes have evolved into an issue with regional monopolies blocking 
competing services.  For example, Verizon makes big money selling Cable 
TV services.  Comcast is NBC Universal and has ties to Hulu and Disney.

-- 
I will not see posts from astraweb, theremailer, dizum, or google
because they host Usenet flooders.

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