Local resolution of some parent domain hosts

[Barry Margolin]

In article <f08kvu$2g0f$1 at sf1.isc.org>,
 "Kerney, Stephen A" <stephen.a.kerney at usa-spaceops.com> wrote:

> Thanks Barry, that did the trick and I'm now using 3 different .db files to 
> locally resolving 3 different fully qualified hostnames to the desired IP
> address on my "parent" domain.
> 
> Here is an example syntax to a host1.b.c.db file (based on responses from 
> October of last year to a similar question along with a couple of "DNS and 
> BIND"
> comments thrown in for good measure).  Please correct me if I have a mistake 
> somewhere.
> 
> 	$TTL   3h 
> 	@       IN      SOA     @ root.localhost (
>                                         3      ; Serial
>                                         3h      ; Refresh after 3 hours
>                                         1h      ; Retry after 1 hour
>                                         1w      ; Expire after 1 week
>                                         1h )    ; Negative caching TTL of 1 
>                                 hour
> 
> 
> 	; Name Servers
> 
> 	@       IN      NS      dns_server.a.b.c
> 
> 	; Addresses for the canonical names
> 
> 	@       	IN	A       	10.0.1.1
> 
> 
> Now I'd like to be able to add aliases to these .db files so I can, if 
> possible, minimize the # of .db files supporting the b.c domain (e.g., 3 
> instead of
> 23).  I tried adding a single CNAME entry to the above .db file without 
> success:
> 
> alias_name	IN	CNAME		host1.b.c.
> 
> I also tried this:
> 
> alias_name	IN	CNAME		@
> 
> Is adding aliases to host.b.c.db files for use in an a.b.c domain supported 
> without creating separate db files for each alias and, if so, how is this 
> done?

I'm not really sure what you're trying to do with these aliases.  The 
above alias creates a name alias_name.host1.b.c that's equivalent to 
host1.b.c.  If that's what you want, it should work (except for the fact 
that underscores aren't allowed in hostnames).

If that's not what you're trying to do, please clarify and we should be 
able to help better.

> 
> 
> Steve
> 
> -----Original Message-----
> From: bind-users-bounce at isc.org [mailto:bind-users-bounce at isc.org]On
> Behalf Of Barry Margolin
> Sent: Friday, April 13, 2007 10:12 PM
> To: comp-protocols-dns-bind at isc.org
> Subject: Re: Local resolution of some parent domain hosts
> 
> 
> In article <evo9vt$12ut$1 at sf1.isc.org>,
>  "Kerney, Stephen A" <stephen.a.kerney at usa-spaceops.com> wrote:
> 
> > Is it possible to configure a BIND 8.1.2 name server which is authoritative 
> > for domain A.B.C. to locally resolve some, but not all, of the hosts on 
> > parent
> > domain B.C. such that B.C. domain name servers are used by the A.B.C. 
> > domain 
> > name server to resolve all other B.C. hosts and x.B.C subdomain hosts and 
> > if
> > so, how is this configuration set up?
> 
> Configure your server as authoritative for the specific host.B.C zones 
> that you don't want to go to the parent server for:
> 
> zone "host1.b.c" {
>   type master;
>   file "host1.b.c.db";
> };
> zone "host2.b.c" {
>   type master;
>   file "host2.b.c.db";
> };
> ....

-- 
Barry Margolin, barmar at alum.mit.edu
Arlington, MA
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