I'm happy with the concept of views, and have used them previously.

Ideally, though (as Chris mentioned) I don't want to have to manage zone
data for the externally used domain, both on my name servers, and those
where it's really provided - on a managed service, hosted and provided
externally.

Having never used DNAME records before, I was really just curious as to
whether I could use them to kind of simply deal with a small number of
records for purely internal usage, without interrupting our internal
resolution of the public names.

But Chris's suggestion of subdomains looks to be very useful - many
thanks for that.

Neil

> -----Original Message-----
> From: bind-users-boun...@lists.isc.org 
> [mailto:bind-users-boun...@lists.isc.org] On Behalf Of Joseph S D Yao
> Sent: 19 June 2009 02:43
> To: Chris Buxton
> Cc: Braebaum, Neil; bind-us...@isc.org
> Subject: Re: Questions about DNAME records
> 
> On Thu, Jun 18, 2009 at 02:12:07PM -0700, Chris Buxton wrote:
> ...
> > Yes, that will absolutely work. But the OP requested a 
> method that did 
> > not involve managing the public data in two places.
> ...
> 
> 
> Which is exactly what views are for.  External data is kept 
> in ONE file,
> as below.
> 
> named.conf:
> 
>       ...
> 
>       acl localfolk {
>               localhost;
>               LOC.AL.NET.WORK/MASK;
>               ...
>       };
> 
>       view "internal" {
>               // This should match our internal networks.
>               match-clients { localfolk; };
> 
>               // Provide recursive service to internal clients only.
>               recursion yes;
> 
>               // Provide a complete view of the example.com zone
>               // including addresses of internal hosts.
>               zone "example.com" {
>                       type master;
>                       file "zone.example.int";
>               };
>       };
> 
>       view "external" {
>               // Match all clients not matched by the previous view.
>               match-clients { any; };
> 
>               // Refuse recursive service to external clients.
>               recursion no;
> 
>               // Provide a restricted view of the example.com zone
>               // containing only publicly accessible hosts.
>               zone "example.com" {
>                       type master;
>                       file "zone.example.ext";
>               };
>       };
> 
> 
> zone.example.ext:
> 
>       $TTL    1d
> 
>       @       IN SOA  ...
>               IN NS   ...
> 
>       // Remember to increment the SOA serial number when this is
>       // updated!
>       $INCLUDE "data/example.ext.data"
> 
> 
> zone.example.int:
> 
>       $TTL    1d
> 
>       @       IN SOA  ...
>               IN NS   ...
> 
>       // Remember to increment the SOA serial number when either of
>       // these is updated!
>       $INCLUDE "data/example.ext.data"
>       $INCLUDE "data/example.int.data"
> 



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