Can MX records point to multiple cnames

[Joseph S D Yao]

On Wed, Jan 05, 2000 at 06:17:40PM -0600, Ben Davies wrote:
> I want to use oxymail.oxy.com as my mx record for all my external machines.
> I also want oxymail to be a cname for each of two firewalls.  Can I do this:
> 
> server1.oxy.com.     in     a     1.1.1.1
> server1.oxy.com .    in    mx    10  oxymail.oxy.com.
> 
> firewall1.oxy.com.    in    a    1.1.1.2
> oxymail.oxy.com.    in    cname    firewall1.oxy.com
> 
> firewall2.oxy.com.    in    a    1.1.1.3
> oxymail.oxy.com.    in    cname    firewall2.oxy.com.

You must do one of two things here:
=======================================================================
server1.oxy.com.	in	a	1.1.1.1
server1.oxy.com.	in	mx	10  firewall1.oxy.com.
server1.oxy.com.	in	mx	10  firewall2.oxy.com.

firewall1.oxy.com.	in	a	1.1.1.2
firewall2.oxy.com.	in	a	1.1.1.3
=======================================================================
or
=======================================================================
server1.oxy.com.	in	a	1.1.1.1
server1.oxy.com.	in	mx	10  oxymail.oxy.com.

firewall1.oxy.com.	in	a	1.1.1.2
oxymail.oxy.com.	in	a	1.1.1.2

firewall2.oxy.com.	in	a	1.1.1.3
oxymail.oxy.com.	in	a	1.1.1.3
=======================================================================

The latter may not do what you want, depending on your configuration.

Oh, and watch the spaces before the final dots: they will render your
zone files invalid.  (As in your MX record.)

-- 
Joe Yao				jsdy at cospo.osis.gov - Joseph S. D. Yao
COSPO/OSIS Computer Support					EMT-B
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