Setting up CIDR PTR Zone

[Mark_Andrews at isc.org]

> 
> I have a /27 that i'm responsible for and need to setup the PTR zone file
> accordingly.
> The ISP has given the company authoritive control for the CIDR block.
> Currently I have a db.204.247.175 file that has PTR RR's from 97-126.  This
> uses the regular convention:
> 
> 97        IN    PTR    hostname.domain.com.
> 
> I changed the above line to look like this:
> 
> 97.96-27.175.247.204        IN    PTR    hostname.domain.com.
> 
> Then pointed a CNAME to it:
> 
> 97        IN    CNAME    97.96-27.175.247.204
> 
> When reloading the zone no slave servers picked up the update.
> What do I have to do to make this work?
> 1. Do I need to change the name of the zone file?
> 2. Should I replace the "-" with a "/"? Or does that matter whatsoever?
> What steps need to be taken in order to accomplish this feat?

	Talk to your ISP.  They should be serving 175.247.204.in-addr.arpa
	and are responable for creating the CNAMES.  You should also
	be slaving 175.247.204.in-addr.arpa so that you can perform
	local lookups when the connection to the Internet as a whole
	is broken.

	You ISP will (or should) have a convention they use for performing
	these sub-delegations.  That will define the name of the zone
	containing your PTR records.

	Mark
> 
> Thanks a bunch.
> 
> Wally Winzer Jr.
> 
> 
--
Mark Andrews, Internet Software Consortium
1 Seymour St., Dundas Valley, NSW 2117, Australia
PHONE: +61 2 9871 4742                 INTERNET: Mark.Andrews at isc.org