From owner-freebsd-net@FreeBSD.ORG  Fri Mar  7 23:52:42 2008
Return-Path: <owner-freebsd-net@FreeBSD.ORG>
Delivered-To: freebsd-net@freebsd.org
Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34])
	by hub.freebsd.org (Postfix) with ESMTP id 15C281065675
	for <freebsd-net@freebsd.org>; Fri,  7 Mar 2008 23:52:42 +0000 (UTC)
	(envelope-from silby@silby.com)
Received: from niwun.pair.com (niwun.pair.com [209.68.2.70])
	by mx1.freebsd.org (Postfix) with SMTP id A70C78FC1E
	for <freebsd-net@freebsd.org>; Fri,  7 Mar 2008 23:52:41 +0000 (UTC)
	(envelope-from silby@silby.com)
Received: (qmail 29545 invoked by uid 3193); 7 Mar 2008 23:52:40 -0000
Received: from localhost (sendmail-bs@127.0.0.1)
	by localhost with SMTP; 7 Mar 2008 23:52:40 -0000
Date: Fri, 7 Mar 2008 18:52:39 -0500 (EST)
From: Mike Silbersack <silby@silby.com>
X-X-Sender: silby@niwun.pair.com
To: Jake Rizzo <rizzojake@gmail.com>
In-Reply-To: <b07c271a0803071455q4c44b626hf93ccad27ffed5ec@mail.gmail.com>
Message-ID: <20080307185203.J27119@niwun.pair.com>
References: <b07c271a0803071455q4c44b626hf93ccad27ffed5ec@mail.gmail.com>
MIME-Version: 1.0
Content-Type: TEXT/PLAIN; charset=US-ASCII; format=flowed
Cc: freebsd-net@freebsd.org
Subject: Re: RELENG-7 tcp connectivity problems with certain clients
X-BeenThere: freebsd-net@freebsd.org
X-Mailman-Version: 2.1.5
Precedence: list
List-Id: Networking and TCP/IP with FreeBSD <freebsd-net.freebsd.org>
List-Unsubscribe: <http://lists.freebsd.org/mailman/listinfo/freebsd-net>,
	<mailto:freebsd-net-request@freebsd.org?subject=unsubscribe>
List-Archive: <http://lists.freebsd.org/pipermail/freebsd-net>
List-Post: <mailto:freebsd-net@freebsd.org>
List-Help: <mailto:freebsd-net-request@freebsd.org?subject=help>
List-Subscribe: <http://lists.freebsd.org/mailman/listinfo/freebsd-net>,
	<mailto:freebsd-net-request@freebsd.org?subject=subscribe>
X-List-Received-Date: Fri, 07 Mar 2008 23:52:42 -0000


On Fri, 7 Mar 2008, Jake Rizzo wrote:

> Hi,
>
> I had two 6.3-STABLE boxen which have been happily running away for months
> on end now without any problems. Last week I upgraded  (via buildworld) both
> boxes to 7.0-STABLE.  Since then I've had reports of some clients being
> unable to connect via tcp.  I've seen this happen first hand on an affected
> remote machine. Traceroute & ping gets to the machine just fine
> but connecting to an open tcp port on the machine just times out.  The
> remote box was a XP machine and so I didn't have the luxury of tcp dump on
> that end, however I did get a chance to run it at the freebsd end:

Try this change; it was too late to be put in 7.0, but it will be merged 
to 7-stable in a few days:

http://www.freebsd.org/cgi/cvsweb.cgi/src/sys/netinet/tcp_var.h.diff?r1=1.160;r2=1.161

-Mike