Root name servers caching DNS entries???

[Kevin Darcy]

An authoritative answer comes from an authoritative server (master or
slave) that has been able to load the zone properly. A non-authoritative
answer comes from cache or from a master or slave that was not able to
load the zone properly. Note that a non-authoritative recursive server
may "pass through" an authoritative answer, so authoritativeness of a
particular query response does not necessarily imply that a particular
server is authoritative for a particular zone, although if you do two
queries of the same name in quick succession from the same server you'll
almost always get a non-authoritative answer for the second query (since
it's from cache) if the server is non-authoritative for the zone. So
it's a fairly good test.


- Kevin

Ravi Nair wrote:

> What is the difference between authoritative answer
> and non-authoritative answer???
>
> --- Michael Ma <nospam.hotbeefjerky at yahoo.com> wrote:
> > DNS gurus,
> >
> > I just found something really weird on the root name
> > servers.
> > The root name server appears to be caching a
> > non-authoritative answer for
> > www.e-pair.com when it should be referring that
> > query to the authoritative
> > name servers.
> > I thought the root name servers were configured not
> > to answer recursive
> > queries.
> > Can anyone explain how this might have happened?
> >
> > I wonder if this is related to a problem I started
> > seeing when I upgraded to
> > 8.2.3.   Before when I have a incorrect cache entry,
> > I would kill named and
> > restart it and that would clear out the incorrect
> > entry.
> > Ever since 8.2.3 that does not work anymore.
> >
> > Does anyone have any insights on the www.e-pair.com
> > entry on the root name
> > servers or  how to clear the dns cache on BIND
> > 8.2.3.?
> > Any help would be appreciated.
> >
> >
> > > e-pair.com.
> > Server:  k.gtld-servers.net
> > Address:  213.177.194.5
> >
> > Name:    e-pair.com
> > Served by:
> > - NS3.CONXION.NET
> >           206.204.210.9
> >           e-pair.com
> > - NS4.CONXION.NET
> >           206.204.235.3
> >           e-pair.com
> > - NS1.CONXION.NET
> >           206.204.4.6
> >           e-pair.com
> >
> >
> > > www.e-pair.com.
> > Server:  k.gtld-servers.net
> > Address:  213.177.194.5
> >
> > Non-authoritative answer:
> > Name:    www.e-pair.com
> > Address:  206.204.35.19
> >
> > > server ns1.conxion.net
> > Default Server:  ns1.conxion.net
> > Address:  206.204.4.6
> >
> > > www.e-pair.com.
> > Server:  ns1.conxion.net
> > Address:  206.204.4.6
> >
> > Name:    www.e-pair.com
> > Address:  206.204.108.250
> >
> > >
> >
> >
> >
>
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