Turning off recusion

Barry Margolin barmar at alum.mit.edu
Sat Oct 21 06:53:09 UTC 2006


In article <ehc4e1$8fs$1 at sf1.isc.org>, "April" <xiaoxia2005a at yahoo.com> 
wrote:

> Barry Margolin wrote:
> > In article <eh8el4$247j$1 at sf1.isc.org>, churchers at gmail.com wrote:
> >
> > > We have 3 nameservers which are now authorative for about 1000 domain
> > > names and have,
> > > unfortunately, been historically used as general purpose resolvers.
> > >
> > > I would like to turn off recusion but if I do, they start reporting any
> > > domain name they don't run dns
> > > for as being non-existant.
> > >
> > > --
> > > pegasus# ping www.google.com
> > > ping: cannot resolve www.google.com: No address associated with name
> > > --
> > >
> > > Shouldn't they be referring the lookup to parent nameservers or am I
> > > missing something?
> >
> > Referring who to the parent nameservers?  Clients almost always have
> > "stub resolvers", which do not implement iteration by themselves.  They
> > send queries with the Recursion Desired flag set, and depend on the
> > server to perform recursion to look up remote names.
> 
> where is this "remote names" coming from?  Is this a DNS terminology?
> That is called something like "names they are not authoritative or not
> cached"!

Remote names are names that are not in your local organization's domain, 
that your local name server is not authoritative for.

-- 
Barry Margolin, barmar at alum.mit.edu
Arlington, MA
*** PLEASE post questions in newsgroups, not directly to me ***
*** PLEASE don't copy me on replies, I'll read them in the group ***



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