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Date:      Sun, 4 Feb 2001 02:32:29 +1100 (EST)
From:      Darren Reed <avalon@coombs.anu.edu.au>
To:        mime@traveller.cz (Michal Mertl)
Cc:        security@FreeBSD.ORG
Subject:   Re: strange dropped packets
Message-ID:  <200102031532.CAA20696@caligula.anu.edu.au>
In-Reply-To: <Pine.BSO.4.21.0102021042360.30602-100000@prg.traveller.cz> from Michal Mertl at "Feb 2, 1 11:55:22 am"

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In some mail from Michal Mertl, sie said:
> I've installed and configured several FreeBSD boxes (>=4.1). On all of
> them I use log_in_vain="YES" in rc.conf. Sometime I also install ipfilter
> (with rules with minimal holes in and outbound traffic with "keep state").
> Either with ipfilter installed or not I see dropped packets in
> /var/log/messages (result of log_in_vain) which seems to me like last
> packets of a regular communications open from inside (either UDP (dns
> queries) or TCP (mostly web)).

On the internet today, I wouldn't be surprised if some packets can transit
the network and take enough time that the state a connection is in causes
it to expire before the "next" packet arrices.



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