Date: Wed, 3 Apr 2002 08:52:21 -0600 From: D J Hawkey Jr <hawkeyd@visi.com> To: Ralf Durkee <ralf@net.rd1.net> Cc: freebsd-stable@FreeBSD.ORG Subject: Re: named connections "in vain" Message-ID: <20020403085221.A20643@sheol.localdomain> In-Reply-To: <200204031437.g33EbsKB038625@net.rd1.net>; from ralf@net.rd1.net on Wed, Apr 03, 2002 at 09:37:54AM -0500 References: <20020403081630.A20450@sheol.localdomain> <200204031437.g33EbsKB038625@net.rd1.net>
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On Apr 03, at 09:37 AM, Ralf Durkee wrote:
>
> > Date: Wed, 3 Apr 2002 08:16:30 -0600
> > From: D J Hawkey Jr <hawkeyd@visi.com>
> > To: stable at FreeBSD <freebsd-stable@FreeBSD.ORG>
> > Subject: named connections "in vain"
> >
> > I have the "log in vain" MIBs set on, and I get these messages, seemingly
> > whenever named queries an external server:
> >
> > Apr 3 07:36:41 sheol /kernel: Connection attempt to UDP 192.168.16.2:2303 from 192.168.16.2:53
> > Apr 3 07:37:45 sheol /kernel: Connection attempt to UDP 192.168.16.2:2311 from 192.168.16.2:53
> > Apr 3 07:37:50 sheol /kernel: Connection attempt to UDP 192.168.16.2:2312 from 192.168.16.2:53
> > Apr 3 07:38:00 sheol /kernel: Connection attempt to UDP 192.168.16.2:2313 from 192.168.16.2:53
> > Apr 3 07:38:20 sheol /kernel: Connection attempt to UDP 192.168.16.2:2314 from 192.168.16.2:53
> >
> > I can't figure out what named is trying to talk with. The only theory I can
> > come up with is that named is not waiting long enough for the forwarder to
> > reply, and does the query itself. When the forwarder does [finally] reply,
> > the connection has already been closed (either by named or ipf)? The Cricket
> > book (3rd ed.) isn't much help on this.
>
> I think you you are very close in your evaluation, I also use log in vain,
> and came to similar conclusions, about these messages. I also noticed that
> it happens for very slow and non-responsive named servers
> (especially spammers if theirs a mail server involved)
> I think increasing the time-out value for your named to be longer than that
> of the forwarder would eliminate the messages if you are concerned.
Thanks. How does one increase the time-out value? Don't tell me it's only
possible by tweaking the source - there doesn't appear to be a config file
option...
> -- Ralf Durkee
Dave
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