Local resolution of some parent domain hosts
Kerney, Stephen A
stephen.a.kerney at usa-spaceops.com
Fri Apr 20 20:58:18 UTC 2007
Bowie,
Until now, my DNS server authoritative for the a.b.c domain has always gone to the b.c domain servers for host.b.c name resolution.
I now have a requirement to resolve names using my a.b.c domain server to IP-address-internal for host.b.c queries while the b.c domain server resolves the
same host.b.c query to IP-address-external.
If I create a single b.c db file I found I'm no longer able to resolve any hosts on the b.c domain that aren't in my b.c db file.
Steve
-----Original Message-----
From: bind-users-bounce at isc.org [mailto:bind-users-bounce at isc.org]On
Behalf Of Bowie Bailey
Sent: Friday, April 20, 2007 11:45 AM
To: bind-users at isc.org
Subject: RE: Local resolution of some parent domain hosts
Kerney, Stephen A wrote:
> Rather than create a name alias1.host1.b.c I was hoping to create the
> name alias1.b.c and have that name resolve to the same IP address as
> host1.b.c
>
> For example, DNS has been configured for some time such that queries
> to host1.a.b.c returns an IP address such as 10.0.1.1.
>
> Using your configuration example, queries to host1.b.c now return the
> same IP address of 10.0.1.1.
>
> The current challenge: Our software developers have given me a list
> of 14 host names on the b.c domain they want resolved to the same IP
> address of
> 10.0.1.1.
>
> Therefore, queries to my DNS server for the following 15 names must
> all return an IP address of 10.0.1.1:
>
> host1.a.b.c
> host1.b.c
> alias1.b.c
> alias2.b.c
> .
> .
> .
> alias12.b.c
> alias13.b.c
>
> Must I have 15 db files, one to cover my a.b.c names and 14 for the
> 14 b.c names?
Why not just have a single b.c db file with 14 entries? You could put
the 15 a.b.c entries in that file as well, or create a second a.b.c db
file for them.
The single file would look something like this (after the SOA header):
host1 IN A 10.0.1.1
host2 IN A 10.0.1.1
host1.a IN A 10.0.1.1
Or you could use cnames:
host1 IN A 10.0.1.1
host1.a IN CNAME host1
--
Bowie
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