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Reply-To: <abonilla@linuxwireless.org>
From: "Alejandro Bonilla" <abonilla@linuxwireless.org>
To: "'Lars Roland'" <lroland@gmail.com>, <Valdis.Kletnieks@vt.edu>
Cc: "'Alejandro Bonilla'" <abonilla@linuxwireless.org>,
       "'Christian Kujau'" <evil@g-house.de>,
       "'Linux-Kernel'" <linux-kernel@vger.kernel.org>
Subject: RE: tg3 in 2.6.12-rc6 and Cisco PIX SMTP fixup
Date: Fri, 17 Jun 2005 07:33:05 -0600
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> > >
> > > On 6/17/05, Alejandro Bonilla <abonilla@linuxwireless.org> wrote:
> > > > one question,
> > > >
> > > >     Can I know what is the problem?
> > > >:I have 2 tg3 adapters, lots e100's and some Cisco PIX
> and devices.
> > > >
> > > > I can try to reproduce it and see if anyone has
> something to say about it.
> > >
> > > Yes please. As I see it. Enable smtp fixup protocol on
> your cisco pix
> > > (you will need to have a smtp server to point it to), then on some
> > > linux system running with a kernel greater than 2.6.8.1
> do a telnet to
> > > the smtp server that is firewalled and try to issue a
> smtp command.
> > >
> > > Note that cisco has a bug report on smtp fixup banner
> hiding issues in
> > > cisco os 6.3.4 but it should not result in the connection getting
> > > dropped, it also does not explain why this problem does
> not seam to
> > > exists on kernels prior to 2.6.9.
> >
> > 2.6.9? This rings a bell.. ;)
> >
> > Does disabling TCP window scaling fix it?
> >
> > echo 0 > /proc/sys/net/ipv4/tcp_window_scaling
>
> Yes it does solve it.
>
> Thanks so much - this will be much easier than getting the largest ISP
> in Denmark to update there Cisco to a new version.
>
>
> Regards.
>
> Lars Roland

Lars, Valdis,

	So what do we really have here? Problem with Cisco or a problem in the
driver? Both?

.Alejandro