[Pdns-users] Re: PTR record

[Stephane Bortzmeyer]

On Tue, Mar 16, 2004 at 07:24:20PM +0100,
 Martin Balint <martin-conf at balint.sk> wrote 
 a message of 31 lines which said:

> With this setup, I can do "host 81.2.209.15 81.2.209.15" and I get
> debian.balint.sk as a result.
> But doing "host 81.2.209.15 some.other.ns" I get NOT FOUND.
> 
> Is my PTR configuration good?

Yes, your server knows the answer. But the rest of the world does not
know that your server knows the answer.

~/tmp % dig -x 81.2.209.15 

; <<>> DiG 9.2.3 <<>> -x 81.2.209.15
;; global options:  printcmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NXDOMAIN, id: 22690
;; flags: qr rd ra; QUERY: 1, ANSWER: 0, AUTHORITY: 1, ADDITIONAL: 0

;; QUESTION SECTION:
;15.209.2.81.in-addr.arpa.      IN      PTR

;; AUTHORITY SECTION:
209.2.81.in-addr.arpa.  10800   IN      SOA     dns.internet-cz.cz. hostmaster.internet-cz.cz. 402121100 10800 3600 1814400 259200

;; Query time: 124 msec
;; SERVER: 192.134.4.134#53(192.134.4.134)
;; WHEN: Wed Mar 17 09:57:01 2004
;; MSG SIZE  rcvd: 107

The reverse domain 209.2.81.in-addr.arpa has not been delegated to
you. Since I assume that you do not have the whole /24, it is time to
read RFC 2317.