PTR zone / VLSM issue

[Ben Bridges]

I agree, it's arbitrary.  If you are wanting to format the name of your zone similarly to the RFC, I believe the format would be 96/27.51.212.195.in-addr.arpa (for the subnet 195.212.51.96/27).
 

________________________________

From: bind-users-bounces at lists.isc.org on behalf of Alan Clegg
Sent: Sun 3/15/2009 4:55 PM
To: bind-users at lists.isc.org
Subject: Re: PTR zone / VLSM issue



Charles Lee wrote:

> I believe its format should be:  96-127.51.212.195.in-addr.arpa
>
> The problem I seem to be having is what order the 96-127 should be in,
> because in normal format the network is 195.212.51.96-127 (we basically
> run address .96 to address .127)
>
> Can anyone help out with the proper format of the zone and what a PTR
> record would look like?

It matters not a bit nor a twiddle, as it is just a label that needs to
be "pointed to" by the actual in-addr label elsewhere.

96.fred.51.212.195.in-addr.arpa.        IN PTR  mymachine.foo.com.

would work fine as long as you had:

fred.51.212.195.in-addr.arpa. IN NS    delegated.foo.com.
96.51.212.195.in-addr.arpa.   IN CNAME 96.fred.51.212.195.in-addr.arpa.

on the nameserver that was actually delegated 51.212.195.in-addr.arpa.

(feel free to use $GENERATE to create the above CNAMEs)

AlanC



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