CentOS - Aug 2009 - Split dns issues

We have internal DNS servers that will override the A record for selected hosts.
Example mail.pdinc.us will have a different internal ip than external. This has
always been a fine way to handle it as the zone files are for that specific
host, and there have never been subdomains before.

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.

Any ideas/questions?

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- Jason Pyeron                      PD Inc. http://www.pdinc.us -
- Principal Consultant              10 West 24th Street #100    -
- +1 (443) 269-1555 x333            Baltimore, Maryland 21218   -
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This message is copyright PD Inc, subject to license 20080407P00.

On Sun, Aug 02, 2009, Jason Pyeron wrote:
>We have internal DNS servers that will override the A record for selected
hosts.
>Example mail.pdinc.us will have a different internal ip than external. This
has
>always been a fine way to handle it as the zone files are for that specific
>host, and there have never been subdomains before.
>
>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.
>
>Any ideas/questions?
We have been doing this with djbdns for years.  The tinydns data files
permit suffixes (suffices?) based on the querying IP address to return
information specific to that IP range.  That is a request for
support at example.com from an ip in 192.168.0.0/16 may return the private LAN
address while one from the outside world the public IP, perhaps on a
different server.

Bill
-- 
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Fax:            (206) 232-9186  Skype: jwccsllc (206) 855-5792

The difference between science and the fuzzy subjects is that science
requires reasoning while those other subjects merely require scholarship.
    -- Robert Heinlein

Am Sonntag, den 02.08.2009, 21:16 +0200 schrieb Jason
Pyeron:
> We have internal DNS servers that will override the A record for selected
hosts.
> Example mail.pdinc.us will have a different internal ip than external. This
has
> always been a fine way to handle it as the zone files are for that specific
> host, and there have never been subdomains before.
>
> 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.
>
> Any ideas/questions?
Bind supports split view out of the box check the documentation the
keywod is "view"

Chris


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Hi,

On Sun, Aug 2, 2009 at 15:16, Jason Pyeron<jpyeron at 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?

HTH,
Filipe