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Date: Tue, 6 Jul 2004 13:36:41 -0700
From: Stephen Hemminger <shemminger@osdl.org>
To: "David S. Miller" <davem@redhat.com>
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 13:28:22 -0700
"David S. Miller" <davem@redhat.com> wrote:

> 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?

No, I don't have a br0ken firewall here.  I can get out fine.
When I setup with same kernel as packages.gentoo.org, it works fine as well.