auth-nxdomain

[Barry Margolin]

In article <12277.959878834 at gromit.rfc1035.com>,
Jim Reid  <jim at rfc1035.com> wrote:
>>>>>> "Nikos" == Nikos Voutsinas <nvoutsin at noc.uoa.gr> writes:
>    Nikos> I' ve also read that I should check for the
>    Nikos> auth-nxdomain option to flag cashed negative responses as
>    Nikos> authoritative.  How can I enable or disable this feature?
>
>This option doesn't do what you think/hope, even if it applied to
>resolvers, which it doesn't. Whether an answer or negative answer is
>authoritative or not has no significant bearing on what another name
>server or resolver does with that answer. At least as far as this
>problem is concerned.

Actually, it does have some bearing.  I think a caching server might not
make a negative cache entry for a non-authoritative NXDOMAIN.  I'm not
sure, though; the documentation of this option says that it's "required by
older BIND software."

-- 
Barry Margolin, barmar at genuity.net
Genuity, Burlington, MA
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