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From: Piotr Roszatycki <[EMAIL PROTECTED]>
To: Debian Bug Tracking System <[EMAIL PROTECTED]>
Subject: kernel-image-2.6.8-1-686: TCP window scaling and broken router
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Package: kernel-image-2.6.8-1-686
Version: 2.6.8-3
Severity: important
Kernel 2.6.8 sets TCP window scaling to 7. It doesn't work with many broken
routers including mine. It is possible to set
net.ipv4.tcp_default_win_scale = 0
in sysctl.conf, but I suggest to prepare the patch which restore old behaviour,
analogical to ECN bit patch.
See http://lwn.net/Articles/92727/
-- System Information:
Debian Release: 3.1
APT prefers unstable
APT policy: (900, 'unstable'), (500, 'testing'), (1, 'experimental')
Architecture: i386 (i686)
Kernel: Linux 2.6.8-1-686
Locale: LANG=pl_PL, LC_CTYPE=pl_PL
Versions of packages kernel-image-2.6.8-1-686 depends on:
ii coreutils [fileutils] 5.2.1-2 The GNU core utilities
ii fileutils 5.2.1-2 The GNU file management utilities
ii initrd-tools 0.1.74 tools to create initrd image for p
ii module-init-tools 3.1-pre5-7 tools for managing Linux kernel mo
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Date: Fri, 24 Sep 2004 16:54:22 +0900
From: Horms <[EMAIL PROTECTED]>
To: Magnus Ekdahl <[EMAIL PROTECTED]>, [EMAIL PROTECTED]
Subject: Re: Bug#272983: Please document this problem
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On Fri, Sep 24, 2004 at 09:11:12AM +0200, Magnus Ekdahl wrote:
> reopen 269604
> retitle 269604 Common kernel problems needs to documented
> thanks
>
> >Ok, I'm betting this is related to #267342. Please try
> >setting /proc/sys/net/ipv4/tcp_default_win_scale to 0, and see if that
> >fixes things for you.
>
> I can confirm that setting /proc/sys/net/ipv4/tcp_default_win_scale to 0
> indeed fixes my problem, i.e. 269604.
>
> Still, I can't see if it is to be corrected with the closing of 272983.
>
> Still as I understand the resolution of 272983
> /proc/sys/net/ipv4/tcp_default_win_scale shouldn't default to 0. In my case
> that would translate to that the firewall at the other end of my connection
> is broken.
>
> Even if that is the case the problem hasn't gone away. Please document the
> problem, or this will be reported again by the next clueless user.
I am not exactly sure where the appropriate place for such documentation
would be. But if you would like to contribute some please feel free.
This is not a kernel bug, it is a bug in your firewall.
I have reclosed the bug accordingly.
--
Horms
