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Date: Tue, 14 Aug 2007 15:31:50 -0400
From: Kris Kennaway <kris@obsecurity.org>
To: Eygene Ryabinkin <rea-fbsd@codelabs.ru>
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Cc: current@freebsd.org, Stefan Lambrev <stefan.lambrev@moneybookers.com>
Subject: Re: "tcpflags 0x18<PUSH,ACK>; tcp_do_segment" kernel messages
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On Tue, Aug 14, 2007 at 06:57:59PM +0400, Eygene Ryabinkin wrote:
> Stefan, good day.
> 
> Tue, Aug 14, 2007 at 02:00:48PM +0300, Stefan Lambrev wrote:
> > >If you were running -CURRENT on the same machine prior to CVSupping,
> > >then you probably saw the 'Spurious RST' messages.  They were
> > >provoked by the same situation.  The messages themselves are harmless,
> > >  
> > This is not harmless here :(
> 
> Yep, sorry.  What I meant is that 'I had no problems with them' ;))
> 
> > I'm running current from today 14.Aug.
> > I use an network applications that hangs every time when I see such a message.
> > 
> > Any ideas how can I debug, or help to someone who is familiar with the code ?
> 
> You can provide the tcpdump's raw dump of the session (sniffed with
> the -s 1500 or whatever MTU you have).  This may sched some light.

tcpdump will probably be essential.

Kris