WildCards & .com, .org, & .net

Re: WildCards & .com, .org, & .net

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>> > #2 The second question is like it just on the other end. Can I do
>> > something like themacintoshguy.* if I have the com net and org or do
>> > I have to have seperate domain entries for each one.
>
>No. The names themacintoshguy.com., themacintoshguy.net. and
>themacintoshguy.org. are subdomains of three different parent domains, and
>authority must be delegated separately for each of them by the corresponding
>parent zones. So they exist in three separate zones and cannot be combined
>into a single zone file.

More generally, if you had such a case where the different desired
names could all be put in the same zone file together, you still
wouldn't be able to use a wildcard.

Here's a quote from the RFC 1034:
____________________________________________________________________

The contents of the wildcard RRs follows the usual rules and formats for
RRs. The wildcards in the zone have an owner name that controls the
query names they will match. The owner name of the wildcard RRs is of
the form "*.<anydomain>", where <anydomain> is any domain name.
<anydomain> should not contain other * labels, and should be in the
authoritative data of the zone. The wildcards potentially apply to
descendants of <anydomain>, but not to <anydomain> itself. Another way
to look at this is that the "*" label always matches at least one whole
label and sometimes more, but always whole labels.
____________________________________________________________________

So *.<anything> is a valid wildcard name. <anything>.*.<anything> and
<anything>.* are not valid wildcard names.
____________________________________________________________________
Chris Buxton cbuxton@menandmice.com
Men & Mice http://www.menandmice.com
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