What will break: "Non-authoritative answer"
Farid Hamjavar
hamjavar at unm.edu
Thu Jun 7 16:49:56 UTC 2001
On Thu, 7 Jun 2001 Mark.Andrews at nominum.com wrote:
> Date: Thu, 07 Jun 2001 13:51:57 +1000
> From: Mark.Andrews at nominum.com
> To: Farid Hamjavar <hamjavar at unm.edu>
> Cc: bind-users at isc.org
> Subject: Re: What will break: "Non-authoritative answer"
>
>
> First of all, learn about human factors. Justified text
> like that below is HARD to read. If you want people to
> answer queries don't make it hard for them.
>
> I'm sure a lot of people on this list read half of the
> first paragraph and gave up.
>
> It doesn't matter about the applications. Nameservers skip
> broken servers/zone and 99.999% of non local end user
> queries will be through nameservers that drop such answers.
> Locally it's not the non-authoratitive of answer that is
> the problem, applications expect to get answers from the
> cache. What is a problem is that servers return SERVFAIL
> rather that NODATA/NXDOMAIN and this breaks things.
>
> Why are you worrying about this? Just fix the broken
> zone/server and be done with it.
No. Just continuous learning about DNS. Thanks to all who responded.
Farid
UNM
>
> Mark
>
> > You all ,I am sure, have come across the situation
> > where due some reasons, syntax error in named.conf or
> > some other configuration errors large or small, got
> > the "Non-authoritative answer" from your DNS server of
> > the domain you admin. i.e. you looked up something
> > and got the correct answer alright, but you also
> > see the "Non-authoritative answer" message. You got
> > "Non-authoritative answer" on a lookup of something for
> > which your DNS server is supposed to be authoritative!
> >
> >
> > Considering the explanation above, here is my question.
> > When in an environment that provides net services like
> > mail,web,ftp,etc,etc what services suffer and become
> > dysfunctional if name-server behave the way explained above?
> >
> > Has anyone compiled a list? e.g. Will MTA of various flavors
> > (sendmail,qmail,etc) become paralyzed if name-server they
> > point to behave the way explained above?
> >
> >
> > Thanks,
> > Farid
> > UNM
> >
> >
> >
> --
> Mark Andrews, Nominum Inc.
> 1 Seymour St., Dundas Valley, NSW 2117, Australia
> PHONE: +61 2 9871 4742 INTERNET: Mark.Andrews at nominum.com
>
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