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Date: Sun, 20 Apr 2008 13:49:27 -0700
From: Jeremy Chadwick <koitsu@freebsd.org>
To: Holger Kipp <hk@alogis.com>
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Cc: stable@freebsd.org
Subject: Re: [FOUND] connection reset after second syn-ack was sent
	(FreeBSD 7.0)
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On Sun, Apr 20, 2008 at 08:23:28PM +0200, Holger Kipp wrote:
> Well, still open questions here. Sight. 
> Suggestions welcome. Ah, the initiating system is HP-UX...

I doubt this is the cause, but it's worth asking.

1) Are you using pf(4) on the RELENG_7 box at all?
2) Have you tried turning off RFC1323 on the RELENG_7 box to see if
   the TCP behaviour changes?  sysctl net.inet.tcp.rfc1323=0.

-- 
| Jeremy Chadwick                                jdc at parodius.com |
| Parodius Networking                       http://www.parodius.com/ |
| UNIX Systems Administrator                  Mountain View, CA, USA |
| Making life hard for others since 1977.              PGP: 4BD6C0CB |