naming of reverse zone record

[Kevin Darcy]

Yes, you can set up a /16 reverse zone and throw all of your PTR's
directly into it, but be aware that if anyone else in your enterprise is
using a chunk of that /16 address range, your nameserver will be blind to
their PTR's unless you delegate one or more /24's to them.


- Kevin

peter at technical-reality.com wrote:

> hey,
>
> if i'm using a net mask such as 255.255.248.0 my third octet is
> variable when specifying hosts.  so how is the forward zone named?
> how does the origin work?  can I use just, "30.128.in-addr.arpa" as my
> zone and then as pointer record for host 172.30.128.221 have this type
> of setup:
>
> @ ......
> ..
> ..
> ..
> 221.128         IN      PTR     <hostname.>