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From: Daniel Drake <dsd@gentoo.org>
To: John Heffner <jheffner@psc.edu>
Cc: netdev@vger.kernel.org, linux-kernel@vger.kernel.org
Subject: Re: 2.6.17 regression: Very slow net transfer from some hosts
Date: Tue, 11 Apr 2006 23:20:42 +0100	[thread overview]
Message-ID: <443C2BBA.5010804@gentoo.org> (raw)
In-Reply-To: <443C178B.3030805@psc.edu>

John Heffner wrote:
> This is almost certainly due to a buggy firewall that doesn't understand 
> TCP window scaling.  I've usually seen this in the past with OpenBSD 
> firewalls.  Do you have one of these in your path?

At home I'm behind a Linux gateway box currently running 2.6.15-rc6 - I 
am connected through ethernet to that.

At my student house I am connected wirelessly to a Linksys WRT54Gv5 
router (the model that doesnt run Linux).

I have reproduced it at both those locations (same ISP).

This is very familiar, and I just found the article I was thinking of: 
http://lwn.net/Articles/92727/

I was also hit by that bug, on the same collection of websites, but that 
particular problem was fixed for 2.6.8 or so. So I guess it is extremely 
likely that my ISP has broken routers. nmap isn't able to identify the 
OS of any ISP routers in my path.

It's a huge ISP over here, so contacting them over technical matters is 
not easy...

Thanks,
Daniel


  reply	other threads:[~2006-04-11 22:08 UTC|newest]

Thread overview: 13+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2006-04-11 19:30 2.6.17 regression: Very slow net transfer from some hosts Daniel Drake
2006-04-11 19:21 ` Stephen Hemminger
2006-04-11 19:23 ` John Heffner
2006-04-11 20:03   ` Daniel Drake
2006-04-11 19:55     ` John Heffner
2006-04-11 20:53       ` Daniel Drake
2006-04-11 20:54         ` John Heffner
2006-04-11 22:20           ` Daniel Drake [this message]
2006-04-11 22:33             ` Stephen Hemminger
2006-04-12  0:06               ` Daniel Drake
2006-04-11 23:59                 ` Stephen Hemminger
2006-04-12  0:32                 ` John Heffner
2006-04-12  0:42                 ` John Heffner

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