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Date: Tue, 6 Jul 2004 13:28:22 -0700
From: "David S. Miller" <davem@redhat.com>
To: Stephen Hemminger <shemminger@osdl.org>
Cc: jamie@shareable.org, netdev@oss.sgi.com, linux-net@vger.kernel.org,
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Subject: Re: [PATCH] fix tcp_default_win_scale.
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On Tue, 6 Jul 2004 13:05:49 -0700
Stephen Hemminger <shemminger@osdl.org> wrote:

> On Tue, 6 Jul 2004 20:40:34 +0100
> Jamie Lokier <jamie@shareable.org> wrote:
> 
> > Are you saying there are broken firewalls which strip TCP options in
> > one direction only?
> 
> It appears so.

Ok, this is a possibility.  And why it breaks is that if the ACK
for the SYN+ACK comes back, the SYN+ACK sender can only assume
that the window scale was accepted.

Stephen, do you have a trace showing exactly this?