What will break: "Non-authoritative answer"
Mark.Andrews at nominum.com
Mark.Andrews at nominum.com
Thu Jun 7 03:51:57 UTC 2001
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.
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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