multiple domains on same ip adresses

[Michael Griffin]

On 8/22/06, Joseph S D Yao <jsdy at center.osis.gov> wrote:
> On Tue, Aug 22, 2006 at 02:15:00PM -0400, Michael Griffin wrote:
> > After searching the archives, I could not find what I am trying to do.
> >
> > I have two registered domains: foosol.com and foosolutions.com.  All
> > of my servers are named after foosol.com.  In my named.conf, I have a
> > foosol.com zone with the corresponding zone and reverse files.  My
> > supervisor desires to have, at the very least, our DNS rseolve our
> > mail server as mail.foosol.com and mail.foosolutions.com.  Can I use
> > aliases (CNAMES)in my zone and reverse files or do I need to add a new
> > zone with zone and reverse files?
> >
> > Thanks,
> >
> > Michael
>
> You only have one reverse DNS zone for the set of IP addresses, not two.
> You really should only have one PTR record per IP address.  It's not
> illegal to have more than one, but applications expect one.
>
> If you already have your DNS set up for both foosol.com and
> foosolutions.com, you can just add an MX record in the foosolutions.com
> domain that points to foosol.com's mail server.  In that mail server's
> 'sendmail' or 'postfix' configuration, allow it to accept e-mail for
> both domains, or possibly to do different things for e-mail to the two
> domains.  If you want CNAMEs from one domain pointing to the other,
> that's certainly possible.
>
> If you want the two domains to be identical, then here's a trick.  On
> the name server with the master copy, use the same file.  On the name
> server with copies of the zone slaved from the master copy, you will
> have to use two different file names so they don't overwrite each other.
>
> --
> Joe Yao
> -----------------------------------------------------------------------
>    This message is not an official statement of OSIS Center policies.
>

Thanks for the help guys.  That appears to have worked.

-- Michael