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Date:      Thu, 28 Sep 2000 18:44:32 -0700 (PDT)
From:      Ken Bolingbroke <hacker@bolingbroke.com>
To:        Jan Knepper <admin@smartsoft.cc>
Cc:        FreeBSD Questions <FreeBSD-Questions@FreeBSD.ORG>
Subject:   Re: DNS: having domain1.com and domain1.net point to the same IP.
Message-ID:  <Pine.BSF.4.21.0009281837210.10037-100000@fremont.bolingbroke.com>
In-Reply-To: <39D29187.75CAB6F1@smartsoft.cc>

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Basically, it goes like this:

 - In the FreeBSD.ORG domain, there is:

   freefall	IN A		216.136.204.21
   www		IN CNAME	freefall

 - In the FreeBSD.NET domain, there is:

   www		IN CNAME	freefall.freebsd.org.

 - And ditto for the FreeBSD.COM domain:

   www		IN CNAME	freefall.freebsd.org.

 - And then the reverse domain points back to the one A record:

   21		IN PTR		freefall.freebsd.org.

You can have multiple A records pointing at the same IP address, but you
can only have that IP address point back at a single A record.  That's
what freefall.freebsd.org does, matches up the A and PTR records, then
uses CNAMEs for all the other hostnames.

Ken

On Wed, 27 Sep 2000, Jan Knepper wrote:

> Hi,
> 
> I just wondered if any DNS specialists out here could give me a
> hand to a pointer as what to do DNS-wise when I want domain1.com
> and domain1.net to point to the same IP. I have noticed that
> freebsd.org, freebsd.com and freebsd.net al seem to give the
> same site.
> 
> I know I can make a dirty change in my DNS and have domain1.net
> point to the same IP, but what about reverse DNS?
> 
> Any suggestions would be appreciated.
> 
> Don't worry, be Kneppie!
> Jan
> 
> --
> Jan Knepper
> Smartsoft, LLC
> 88 Petersburg Road
> Petersburg, NJ 08270
> U.S.A.
> 
> http://www.smartsoft.cc/
> http://www.mp3.com/pianoprincess
> 
> Phone : 609-628-4260
> FAX   : 609-628-1267
> FAX   : 303-845-6415 http://www.fax4free.com/
> 
> Phone : 020-873-3837 http://www.xoip.nl/ (Dutch)
> FAX   : 020-873-3837 http://www.xoip.nl/ (Dutch)
> 
> In God we Trust -- all others must submit an X.509 certificate.
>     -- Charles Forsythe <forsythe@alum.mit.edu>
> 
> 
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