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Date:      Thu, 28 Jun 2007 14:50:40 +0400
From:      Eygene Ryabinkin <rea-fbsd@codelabs.ru>
To:        Steve Kargl <sgk@troutmask.apl.washington.edu>
Cc:        freebsd-current@freebsd.org
Subject:   Re: SYNCOOKIE authentication problems
Message-ID:  <20070628105039.GE11335@void.codelabs.ru>
In-Reply-To: <20070628014311.GA50012@troutmask.apl.washington.edu>
References:  <20070628014311.GA50012@troutmask.apl.washington.edu>

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Steve, good day.

Wed, Jun 27, 2007 at 06:43:11PM -0700, Steve Kargl wrote:
> Any advice on how to isolate or avoid?
> 
> Jun 27 18:31:19 node11 kernel: TCP: [192.168.0.11]:59661 to 
> [192.168.0.11]:63266 tcpflags 0x10<ACK>; syncache_expand: Segment failed
> SYNCOOKIE authentication, segment rejected (probably spoofed)

According to Andre Oppermann, these are harmless:
    http://lists.freebsd.org/pipermail/freebsd-net/2007-June/014401.html

But I am expiriencing some problems related to the other messages
like 'tcp_input: Listen socket: Spurious RST, segment rejected'.
Though it seems not to be your case, but my problems are documented
in the aforementioned thread.  Just in case you're curious...
-- 
Eygene



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