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Date: Thu, 2 Nov 2006 19:29:27 +0100
From: Jilles Tjoelker <jilles@stack.nl>
To: Doug Barton <dougb@FreeBSD.org>
Message-ID: <20061102182927.GA20182@stack.nl>
References: <20061022095811.GA10743@zaphod.nitro.dk>
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Cc: freebsd-current@freebsd.org, Hajimu UMEMOTO <ume@FreeBSD.org>,
	"Simon L. Nielsen" <simon@FreeBSD.org>
Subject: Re: Resolver not always resolving hostnames
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On Sun, Oct 22, 2006 at 04:23:48PM -0700, Doug Barton wrote:
> Simon L. Nielsen wrote:
> 
> >I also seen odd things happen with host(1).  These two commands were
> >run right after each other.  I don't know if it's related, but I
> >suspect it is.

> >$ host cvsup3.dk.freebsd.org
> >cvsup3.dk.freebsd.org is an alias for mirror03.inet.tele.dk.
> >cvsup3.dk.freebsd.org is an alias for mirror03.inet.tele.dk.

> You got a double answer here because by default host(1) searches for 
> both A and AAAA records for hostnames.

It usually gives three of them, for A, AAAA and MX.

> >$ host cvsup3.dk.freebsd.org
> >cvsup3.dk.freebsd.org is an alias for mirror03.inet.tele.dk.
> >mirror03.inet.tele.dk has address 195.41.53.219

> You got an answer for the A query here for mirror03.inet.tele.dk.

> >cvsup3.dk.freebsd.org is an alias for mirror03.inet.tele.dk.

> You got an answer here for the AAAA query for cvsup3.dk.freebsd.org.

> >cvsup3.dk.freebsd.org is an alias for mirror03.inet.tele.dk.

> This is probably an error, and if it's what I think it is this problem 
> is fixed in the latest version of BIND.

It is the answer to the MX query.

These triple "is an alias for" are since bind9's host or so.

-- 
Jilles Tjoelker