PTR zone / VLSM issue

[Alan Clegg]

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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