From: Jamie Lokier <jamie@shareable.org>
To: Stephen Hemminger <shemminger@osdl.org>
Cc: netdev@oss.sgi.com, linux-net@vger.kernel.org,
linux-kernel@vger.kernel.org
Subject: Re: [PATCH] fix tcp_default_win_scale.
Date: Tue, 6 Jul 2004 20:40:34 +0100 [thread overview]
Message-ID: <20040706194034.GA11021@mail.shareable.org> (raw)
In-Reply-To: <20040706114741.1bf98bbe@dell_ss3.pdx.osdl.net>
Stephen Hemminger wrote:
> Recent TCP changes exposed the problem that there ar lots of really
> broken firewalls that strip or alter TCP options. When the options
> are modified TCP gets busted now. The problem is that when we
> propose window scaling, we expect that the other side receives the
> same initial SYN request that we sent. If there is corrupting
> firewalls that strip it then the window we send is not correctly
> scaled; so the other side thinks there is not enough space to send.
If a firewall strips the window scaling option in both directions,
then window scaling is disabled (RFC 1323 section 2.2).
Are you saying there are broken firewalls which strip TCP options in
one direction only?
-- Jamie
next prev parent reply other threads:[~2004-07-06 19:40 UTC|newest]
Thread overview: 39+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <32886.63.170.215.71.1088564087.squirrel@www.osdl.org>
[not found] ` <20040629222751.392f0a82.davem@redhat.com>
[not found] ` <20040630152750.2d01ca51@dell_ss3.pdx.osdl.net>
[not found] ` <20040630153049.3ca25b76.davem@redhat.com>
2004-07-01 20:37 ` [PATCH] TCP acts like it is always out of memory Stephen Hemminger
2004-07-01 21:04 ` David S. Miller
2004-07-02 1:32 ` Arnaldo Carvalho de Melo
2004-07-06 9:35 ` analysis of TCP window size issues still around - several reports / SACK involved? bert hubert
2004-07-06 18:47 ` [PATCH] fix tcp_default_win_scale Stephen Hemminger
2004-07-06 19:40 ` Jamie Lokier [this message]
2004-07-06 20:05 ` Stephen Hemminger
2004-07-06 20:28 ` David S. Miller
2004-07-06 20:36 ` Stephen Hemminger
2004-07-06 20:35 ` David S. Miller
2004-07-06 21:55 ` John Heffner
2004-07-06 22:50 ` David S. Miller
2004-07-07 1:32 ` John Heffner
2004-07-06 23:01 ` PLS help fix: recent 2.6.7 won't connect to anything " bert hubert
2004-07-06 20:12 ` David S. Miller
2004-07-06 22:44 ` bert hubert
2004-07-06 22:49 ` David S. Miller
2004-07-07 18:06 ` Stephen Hemminger
2004-07-07 19:31 ` Jamie Lokier
2004-07-07 19:38 ` bert hubert
2004-07-07 19:41 ` John Heffner
2004-07-09 23:14 ` David S. Miller
2004-07-06 20:00 ` Nivedita Singhvi
2004-07-06 20:16 ` David S. Miller
2004-07-06 20:26 ` David Ford
[not found] ` <20040706185856.GN18841@lug-owl.de>
2004-07-06 20:17 ` David S. Miller
2004-07-06 20:31 ` Stephen Hemminger
2004-07-06 20:33 ` David S. Miller
2004-07-06 20:24 ` David S. Miller
2004-07-06 23:16 ` Andi Kleen
2004-07-07 7:50 ` Chris Wedgwood
2004-07-06 23:19 ` Redeeman
2004-07-07 19:47 ` John Heffner
2004-07-06 20:19 ` analysis of TCP window size issues still around - several reports / SACK involved? David S. Miller
2004-07-06 20:27 ` bert hubert
2004-07-06 20:31 ` David S. Miller
2004-07-07 21:25 ` Alessandro Suardi
2004-07-06 20:35 [PATCH] fix tcp_default_win_scale Tim Berti
2004-07-06 20:54 ` David Ford
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