Reverse Dns Question

[Wouter Van Crombruggen]

This is indeed a classless subnet, namely 64.42.54.232/29. This can be
delegated using the following "trick":

in the zonefile 54.42.64.in-addr.arpa we create the following records:

232/29    IN NS    ns1.yournamserver.com
232/29    IN NS    ns2.yournamserver.com

This means the subdomain 232/29.54.42.64.in-addr.arpa is delegated to your
server.

Then within the zonefile 54.42.64.in-addr.arpa we create a CNAME record for
every IP within your range:

232        IN CNAME    232.232/29.54.42.64.in-addr.arpa.
233        IN CNAME    233.232/29.54.42.64.in-addr.arpa.

until

240        IN CNAME    240.232/29.54.42.64.in-addr.arpa.

On ns1.yournamserver.com, you create the zone 232/29.54.42.64.in-addr.arpa
with the following records:

232        IN PTR            your.first.host.
233        IN PTR            your.second.host.

until

240        IN PTR            your.last.host.

That's it :-)

Wouter.


"Mike Lander" <mechiman at home.com> wrote in message
news:9i6cck$eqc at pub3.rc.vix.com...
> If you are assigned a ip range of 64.42.54.233~64.42.54.239 with a masq
> 255.255.255.248 (I am just trying to figure out what a classless subnet
is).
>
> Is this a classless subnet? Since it gives you six usable IP's. The reason
I
> ask is if you Isp assigns you a range like this. Is there a way to make
> a reverse zone. I was told I would have to obtain a say whole class C
subnet
> to be able to use reverse zones. I have my own name servers and domain
> and everything works without the reverse zones. Since a reverse zone for
> this would be 54.42.64 you cant create a zone without taking up all the
> addresses
> between. This has me a little puzzled could anyone shed some light on this
> please?
>
>
> Mike
>
>
>