How to override a DNS entry on internal network? (for soem hosts only!)

[leancode]

On Jul 18, 8:18 pm, mara... at gmail.com wrote:
> Hello!
>
> We have a bind DNS in our company, and we would like to be able to use
> it to override the mappings provided by an external master DNS server
> for our domain.
>
> For example...
>
> There is a ns1.mydomain.com somewhere out there on the internet and it
> translates the following hostnames:
>
> host1.mydomain.com (123.123.123.123)
> host2.mydomain.com (123.123.123.124)
>
> we now want to be able to override the entry for host1.mydomain.com if
> looked up from within the company intranet which is served by the
> Company intranet DNS...
>
> BUT
>
> ... in this intranet DNS we want to edit only the hosts that we want
> to override. Meaning there was no  host2.mydomain.com entry in
> intranet DNS then the Internet DNS Server should be looked up and the
> 123.123.123.124 IP returned.
>
> I was able to set the intranet DNS to override the whole domain but I
> don't want to have to enter each Master record of the internet DNS. Is
> there some way to pass the query to another domain DNS if no local
> entry found?
>
> Any other suggestions?

http://www.isaserver.org/tutorials/You_Need_to_Create_a_Split_DNS.html

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