DNS reverse sub delegation NXDOMAIN problem, Class C

[Mukund Sivaraman]

Hi Bazy

On Tue, Aug 19, 2014 at 08:12:58AM -0400, Bazy V wrote:
> so I set up the following in my reverse file for ns2.sub.test.com domain
> -----------------------
> $ORIGIN 20.172.IN-ADDR.ARPA.
> 
>                    NS     ns1.test.com
> 0.220/24       NS     ns2.sub.test.com
> 43.222          IN PTR  ns1.test.com.
> 97.201          IN PTR  dev1.test.com.

The "220/24" isn't treated as a netmask for automatic expansion. It is
used exactly. The only thing that generates records is the $GENERATE
directive, but even it doesn't understand "220/24" as something for
expansion.

As another poster pointed out, you don't need to delegate a /24 network
using classless delegation, but if you want to delegate a set of
addresses, say 172.20.200.0-172.20.200.63, you'd use something like
this:

(a) In 20.172.IN-ADDR.ARPA. zone:

0-63.220                  NS      ns-other.example.com.
$GENERATE 0-63    $.220       CNAME   $.0-63.220

# which should generate:
# 0.220 CNAME 0.0-63.220.20.172.IN-ADDR.ARPA.
# 1.220 CNAME 1.0-63.220.20.172.IN-ADDR.ARPA.
# 2.220 CNAME 2.0-63.220.20.172.IN-ADDR.ARPA.
# ...
# 63.220 CNAME 63.0-63.220.20.172.IN-ADDR.ARPA.

(b) on ns-other.example.com, in 0-63.220.20.172.IN-ADDR.ARPA. zone:

0 PTR zero.example.com.
1 PTR one.example.com.
# etc.

> .
> .
> $ORIGIN 220.20.172.IN-ADDR.ARPA.
> $GENERATE    1-255    $       CNAME   $.220/24
> ---------------------------------------
> 
> When I do a named-checkzone and out put it , it seems to have written the
> right records like
> 
> 42.220.20.172.IN-ADDR.ARPA.          TTL   IN CNAME
> 42.220/24.220.20.172.IN-ADDR.ARPA.

In your config in zone 20.172.IN-ADDR.ARPA., there are no delegations
for 220/24.220.20.172.IN-ADDR.ARPA.

		Mukund
-------------- next part --------------
A non-text attachment was scrubbed...
Name: not available
Type: application/pgp-signature
Size: 2881 bytes
Desc: not available
URL: <https://lists.isc.org/pipermail/bind-users/attachments/20140819/e2b86b45/attachment.bin>