Re: Explain this one- IT's BAAACCCCKKK!
- From: Jeff Liebermann <jeffl@xxxxxxxxxx>
- Date: Tue, 01 Jan 2008 10:37:46 -0800
"Peter Pan" <PeterPanNOSPAM@xxxxxxxxxxxxxxxxx> hath wroth:
That's what was really strange, mail/news/ftp/irc servers all worked (albeit
very slowly, when the main server was very slow or didn't work), cept for a
few minutes when the cable signal itself was so bad the screen was
pixelating, was just the browser/http stuff that was wierd.
Well, the only things I could think of that would cause protocol
specific slowdowns is if Comcast was trying to filter port 80 traffic,
or that users were somehow overusing port 80. Both are probably the
case as Comcast is tinkering with Bitorrent traffic and apps that try
to avoid filters are using port 80.
<http://www.dslreports.com/forum/r18323368-Comcast-is-using-Sandvine-to-manage-P2P-Connections>
<http://www.sandvine.com>
Most of the time
it only slowed down from 2500 to 300, happened to get a 24 at one time
before it died altogether, and at those speeds it still sort of worked but
very slowly, was only once in a while when it got even slower/stopped/just
an error message. Makes me wonder if there is a minimum speed requirement
for different types of servers. At any rate, from the OP's post and what was
happening here, seemed sort of similar.
It's possible. Another guess(tm) would be that a protocol filtering
router (used to throttle Bitorrent traffic) fails at some specific
traffic threshold. Think of it as collateral damage.
PS The guy was here today, and when he went up the pole and disconnected the
cable, water came out. He cut a few feet off, put new ends on, reconnected
it and now it is working (jury is still out on whether it's just working, or
gonna be working/fine, next time it rains)...
Lovely. Hopefully that will fix it. You can watch the signal levels
on your cable modem (as I described in a previous rant). If you have
a spectrum analyzer, you can also watch it change frequency response,
ingress, reverse leakage from your junk TV's, etc.
--
Jeff Liebermann jeffl@xxxxxxxxxx
150 Felker St #D http://www.LearnByDestroying.com
Santa Cruz CA 95060 http://802.11junk.com
Skype: JeffLiebermann AE6KS 831-336-2558
.
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- Re: Explain this one- IT's BAAACCCCKKK!
- From: Jeff Liebermann
- Re: Explain this one- IT's BAAACCCCKKK!
- From: Peter Pan
- Re: Explain this one- IT's BAAACCCCKKK!
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