in-addr.arpa question

Joseph S D Yao jsdy at cospo.osis.gov
Thu Dec 2 18:06:08 UTC 1999


On Tue, Nov 30, 1999 at 01:57:36PM -0800, Bret Ford wrote:
> My ISP, at my request, recently delegated to me responsibility
> for reverse name look up.  I have a DSL connection with 6 IPs (including
> the gateway).  They did it this way (output from 'dig'):
> 
>  9.57.102.216.in-addr.arpa.  2H IN CNAME   9.8.57.105.216.in-addr.arpa.
> 10.57.102.216.in-addr.arpa.  2H IN CNAME  10.8.57.105.216.in-addr.arpa.
> 11.57.102.216.in-addr.arpa.  2H IN CNAME  11.8.57.105.216.in-addr.arpa.
> 12.57.102.216.in-addr.arpa.  2H IN CNAME  12.8.57.105.216.in-addr.arpa.
> 13.57.102.216.in-addr.arpa.  2H IN CNAME  13.8.57.105.216.in-addr.arpa.
> 14.57.102.216.in-addr.arpa.  2H IN CNAME  14.8.57.105.216.in-addr.arpa.
> 
> I haven't been able to get this to work.  Is it kosher to CNAME across
> class B networks this way?  I'm rather new to this, so please pardon me
> if that's a dumb question.  Assistance much appreciated!
> 
> Bret Ford

Perfectly kosher.

They need to delegate zone "8.57.105.216.in-addr.arpa" to your name
server - would that be dante.plover.org?

Once this is done, you need to create a zone "8.57.105.216.in-addr.arpa"
on your name server.  It will contain a $TTL, an SOA, the NS records,
and

9		IN  PTR		name1.domain.
10		IN  PTR		name2.domain.
(etc.)

Ah - I see you've already done this.  ;-)

-- 
Joe Yao				jsdy at cospo.osis.gov - Joseph S. D. Yao
COSPO/OSIS Computer Support					EMT-B
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