Subnet reverse delagation, RFC 2317

[Phil Mayers]

On 07/29/2010 08:58 AM, Jukka Pakkanen wrote:
> Doing first time the RFC 2317 style subnet reverse DNS, and have a
> problem with recursion.  When doing a query like "dig @ns1.qnet.fi -x
> 62.142.217.200" is succeeds from the local network, but outside I get
> "recursion requested but not available".  Our /24 reverse zones work

It doesn't look like the reverse is deleted to you:

$ dig +comm +nocmd +noques +nostat @ns6.sci.fi 
25.217.142.62.in-addr.arpa ptr
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NXDOMAIN, id: 35109
;; flags: qr aa rd; QUERY: 1, ANSWER: 0, AUTHORITY: 1, ADDITIONAL: 0
;; WARNING: recursion requested but not available

;; AUTHORITY SECTION:
217.142.62.in-addr.arpa. 3600	IN	SOA	ns3.sci.fi. hostmaster.sci.fi. 
1280318067 3600 900 604800 3600

i.e. no CNAME records for the sub-/24.