linux-kernel - Re: regression(?): starting with 2.6.21 sending packets became broken.

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Message-ID:  <20071013162324.7c140a61@freepuppy.rosehill>
Date:	Sat, 13 Oct 2007 16:23:24 -0700
From:	Stephen Hemminger <shemminger@...ux-foundation.org>
To:	linux-kernel@...r.kernel.org
Subject:  Re: regression(?): starting with 2.6.21 sending packets became
 broken.

On Sat, 13 Oct 2007 22:35:25 +0200 (CEST)
Jan Engelhardt <jengelh@...putergmbh.de> wrote:

> 
> On Oct 13 2007 19:59, David wrote:
> >Try
> >
> >echo 0 > /proc/sys/net/ipv4/tcp_window_scaling
> >
> >I bet you have broken router(s) between your machine and the problem
> >site(s).
> 
> There is an xt_TCPOPTSTRIP module in the works that allows you to strip
> Window Scaling only on the connections you want (rather than globally);
> seems to be in for 2.6.24 at earliest, though it's there is also the 
> standalone patch.

You can also do it on a per route basis which is easier than bothering
with filtering rules by just enforcing a window size limit.

	ip route add {broken_dst}/32 via {gateway} window 65535


Long description at:
	http://lwn.net/Articles/92727/

-- 
Stephen Hemminger <shemminger@...ux-foundation.org>

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