-----Original Message----- From: centos-bounces@centos.org [mailto:centos-bounces@centos.org] On Behalf Of Filipe Brandenburger Sent: Monday, August 03, 2009 10:10 To: CentOS mailing list Subject: Re: [CentOS] Split dns issues
Hi,
On Sun, Aug 2, 2009 at 15:16, Jason Pyeronjpyeron@pdinc.us wrote:
Now we want to just override the MX records for pdinc.us without having to merge or manage all the records for every
entry/subdoamin in
the zone file for pdinc.us.
Why don't you just set the MX records of pdinc.us to something inside mail.pdinc.us? Then both your outside and inside will see the same name, but you can resolve them to different IPs inside mail.pdinc.us depending on being on the inside or outside network. If you want something other than MX records, you can use CNAMEs to something in a subdomain for which you will use "views", and then on the subdomain resolve to different IPs depending on the query being internal or external... Would that work for you?
My worry is the A record for the outsourced mail service is out of our control, if it were to change it would be catastrophic.
I like the idea about the cname. Can a cname be used as a host for a MX record? The other fear is the outsourced (showing ignorance on SMTP here) might react badly to the client making a connection to a server with a name different than they expected, as it looks like they are doing a name based virtual hosting.
I will look in to it.
Thanks,
-Jason
-- -=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=- - - - Jason Pyeron PD Inc. http://www.pdinc.us - - Principal Consultant 10 West 24th Street #100 - - +1 (443) 269-1555 x333 Baltimore, Maryland 21218 - - - -=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=- This message is copyright PD Inc, subject to license 20080407P00.