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Re: Catchall subdomain: msg#00492

Subject: Re: Catchall subdomain

        While wildcard records are legal.  Most people don't use them
        properly and get caught by the side effects of wildcard record.
        
        Using wildcard records to save a few lines in a zone file is
        generally wrong.  Rather than getting a negative answer at the
        DNS level, the application has to go through the process of
        discovering that the name doesn't exist after establishing a
        connection.

        It also impacts on the search algorithms in resolvers.

        If you have a way of identifying every name in use in a
        zone then it is better to use specific names than wildcards.

        Mark

> 
> Liam:
> 
>  You hit the nail on the head. However, instead of using an A record, I would
>  
> recommend a CNAME, that way you don't have to do anything strange in your 
> reverse database. This works for me:
> 
> dflx  IN      A       67.36.126.141
> *     IN      CNAME   dflx.flanigan.net.
> 
>  Dave
> 
> --
> Kind Regards, 
> David A. Flanigan
> 
> dave@xxxxxxxxxxxx
> http://www.flanigan.net
> 
> 
> ---------- Original Message -----------
> From: "Liam MacKenzie" <misclists@xxxxxxxxxxxxxxxxxxx>
> To: <bind9-users@xxxxxxx>
> Sent: Thu, 29 Aug 2002 15:36:13 +1000
> Subject: Catchall subdomain
> 
> > Hey all,
> > 
> > I was wondering, how would you go about setting up a catchall subdomain...
> > 
> > For example...  Instead of having:
> > 
> > $ttl 38400
> > nudenurd.com. IN SOA ns1.operationenigma.com. 
> > webmaster.nudenurd.com. (   1014281308   10800   3600   604800   
> > 38400 ) nudenurd.com.  IN NS ns1.operationenigma.com. 
> > www.nudenurd.com. IN A 203.45.222.134 mail.nudenurd.com. IN A 203.45.222.13
> 4
> > nudenurd.com.  IN A 203.45.222.134
> > blahblah...
> > 
> > Is it possible to have something like:
> > 
> > $ttl 38400
> > nudenurd.com. IN SOA ns1.operationenigma.com. 
> > webmaster.nudenurd.com. (   1014281308   10800   3600   604800   
> > 38400 ) nudenurd.com.  IN NS ns1.operationenigma.com. 
> > *.nudenurd.com. IN A 203.45.222.134
> > 
> > Know what I mean?
> > 
> > Cheers,
> > Liam
> ------- End of Original Message -------
> 
> 
--
Mark Andrews, Internet Software Consortium
1 Seymour St., Dundas Valley, NSW 2117, Australia
PHONE: +61 2 9871 4742                 INTERNET: Mark.Andrews@xxxxxxx




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