DNS timeouts

[Mark Andrews]

> On Wed, 1 Dec 2004, [ISO-8859-2] Kovács Péter wrote:
> 
> > Hello,
> >
> >
> > I have asked a similar question regarding to this issue, but
> > so far no solutions were made. Please help me.
> >
> > I have a FreeBSD 4-STABLE box with udp.log_in_vain enabled.
> > Since the computer has 3 IP’s and only one network card
> > (virtual hosts) it should resolve names pretty fast (lot’s
> > of services).
> > So I got these error messages:
> > Connection attempt to UDP FreeBSD Box:4320 from DNS:53
> > Connection attempt to UDP FreeBSD Box:1363 from DNS:53
> > This is because the DNS lookups are timing out. So I had set
> > up a DNS server on the FreeBSD itself for the errors to stop.
> >
> > I just have no luck with it. The same errors come up. I just
> > simply can’t understand how this time out could happen if it
> > goes on localhost. And the DNS is not overloaded.
> >
> > I also tried to edit the /etc/resolv.conf file and add a
> > „lookup file bind
> > „ line but I think this is not supported in FreeBSD. At
> > least it’s not in the manual and it didn’t help.
> >
> > What can I do? I don’t want to disable udp.log_in_vain!

	You ignore them.  They won't go away as they are part and
	parcel of the tradeoffs made in the design of the DNS.
 
> Hey Peter,
> I did a google search and found this thread on the freebsd-security list:
> 
> http://lists.freebsd.org/pipermail/freebsd-security/2003-April/000127.html
> 
> Does that look about right?
> Crist J. Clark had a good summary at the end of the thread with what
> appears to be causing it.
> 
> You don't really include any information about your DNS setup that could
> be useful for troubleshooting that, though.
> What DNS server/version are you running?  Bind 8 or 9 maybe?
> I think what you may have been looking for was the /etc/host.conf file.
> Hope this is useful.
> 								-Tenebrae.
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--
Mark Andrews, ISC
1 Seymour St., Dundas Valley, NSW 2117, Australia
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