Handling subdomain ?

Kevin Darcy kcd at daimlerchrysler.com
Thu Sep 14 20:30:13 UTC 2000


Just add a wildcard ("*") A record. It should do what you want.


- Kevin

Jason wrote:

> Okay, being a total novice these answers just left me in the dark..!!
> Is it possible for me to have all subdomains directed, even though none are
> in the DNS.. a sort of wildcard record..???
>
> regards,
> Steen
>
> Kevin Darcy <kcd at daimlerchrysler.com> wrote in message
> news:39C04E84.D06D0237 at daimlerchrysler.com...
> >
> > Yes, it is over-qualified, and just plain clumsy. Please replace with:
> >
> >     The wildcard record will match any query of the zone with the same
> record
> > type, unless the queried name is a component of an existing subdomain or
> has an
> > explicit record in the zone.
> >
> > (I'm using "match" here in the semi-layperson's sense of producing a
> usable, i.e.
> > non-empty, answer. Wildcard "matches" which produce NODATA responses seem
> rather
> > counter-intuitive).
> >
> >
> > - Kevin
> >
> > Mark.Andrews at nominum.com wrote:
> >
> > > It doesn't matter what was given.  Your description was wrong. You over
> > > qualified it.
> > >
> > > Mark
> > >
> > > >
> > > > A non-record-owning, non-subdomain QNAME was stipulated. Thus QNAME
> doesn't m
> > > > atch
> > > > any label -- even a non-terminal one -- and the algorithm falls
> through Steps
> > > >  3(a)
> > > > and 3(b).
> > > >
> > > >
> > > > - Kevin
> > > >
> > > > Mark.Andrews at nominum.com wrote:
> > > >
> > > > >         Section 4.3.2, Step 3(a) applies first.
> > > > >
> > > > >         "a. If the whole of QNAME is matched, we have found the
> > > > >             node.
> > > > >
> > > > >             If the data at the node is a CNAME, and QTYPE doesn't
> > > > >             match CNAME, copy the CNAME RR into the answer section
> > > > >             of the response, change QNAME to the canonical name in
> > > > >             the CNAME RR, and go back to step 1.
> > > > >
> > > > >             Otherwise, copy all RRs which match QTYPE into the
> > > > >             answer section and go to step 6."
> > > > >
> > > > >         Note:
> > > > >         1. this is independent of type.
> > > > >         2. "all RRs which match type" may be zero.
> > > > >
> > > > >         Mark
> > > > > >
> > > > > > Huh? RFC 1034, Section 4.3.2, Step 3(c):
> > > > > >
> > > > > >
> > > > > > > [...]
> > > > > > >
> > > > > > > If the "*" label does exist, match RRs at that node
> > > > > > >             against QTYPE.
> > > > > > >
> > > > > >                ^^^^^^^^^^^^^
> > > > > >
> > > > > > >   If any match, copy them into the answer
> > > > > > >             section, but set the owner of the RR to be QNAME,
> and
> > > > > > >             not the node with the "*" label.  Go to step 6.
> > > > > > >
> > > > > >
> > > > > >
> > > > > > - Kevin
> > > > > >
> > > > > >
> > > > > > Mark.Andrews at nominum.com wrote:
> > > > > >
> > > > > > > >
> > > > > > > > Sure, just put a wildcard ("*") entry into the something.dk
> zone. Thi
> > > > s wi
> > > > > > ldca
> > > > > > > > rd
> > > > > > > > record will be matched by any name in the domain which is not
> a subdo
> > > > main
> > > > > >  and
> > > > > > > > which does not have an explicit record of the same type in the
> zone.
> > > > > > > >
> > > > > > > >
> > > > > > > > - Kevin
> > > > > > >
> > > > > > >         '*' matches against a name that does not exist.  It is
> independ
> > > > ent
> > > > > > of
> > > > > > >         the query type.
> > > > > > >
> > > > > > >         Mark
> > > > > > >
> > > >
> > > >
> > > >
> > > >
> > > >
> > > --
> > > 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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