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Date:      Sat, 22 Feb 2003 12:10:54 -0500
From:      Alexander Anderson <alex@upful.org>
To:        freebsd-security@FreeBSD.ORG, freebsd-ports@FreeBSD.ORG
Subject:   Re: FireDNS and net.inet.udp.log_in_vain
Message-ID:  <20030222171054.GA97944@dusty.upful.org>
In-Reply-To: <1045544795.19726.3.camel@sambo.fud.org.nz>
References:  <873cmmpc16.wl@bemidji.meridian-enviro.com> <1045544795.19726.3.camel@sambo.fud.org.nz>

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> >   Connection attempt to UDP <our-ip>:<port-above-1024> from
> >   <ip-addr-in-resolv.conf>:53
> 
> I believe this is caused when the dns server is slow/overloaded, the
> resolver queries the server but the packet arrives back after the local
> port is closed.  

Is there any way to set up a rule in IPFW to drop such packets?

Or, as a workaround, if there a way to set up syslog to ignore these
"connection attempts"?

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