[Pdns-users] ptr - revese dns

[Michael Loftis]

--On April 19, 2006 10:51:04 PM +0100 Luis Matos <gass at otiliamatos.ath.cx> 
wrote:


> if the ip is, why not the reverse? good question ... the ip in quetion is
> 212.54.133.46


Reverse DNS has to be delegated either on a /24 or via CNAMEs in the 
surrounding /24, you don't control your own reverse DNS if all you have is 
a single IP, the ISP/provider of that IP controls it.  To that end broadnet 
will have to add PTRs for you to your A records.  Note that reverse DNS is 
*TWO* parts, a PTR, and a corresponding A record.

d216-220-25-20:~ mloftis$ dig ns 133.54.212.in-addr.arpa

; <<>> DiG 9.2.2 <<>> ns 133.54.212.in-addr.arpa
;; global options:  printcmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 1313
;; flags: qr rd ra; QUERY: 1, ANSWER: 2, AUTHORITY: 0, ADDITIONAL: 0

;; QUESTION SECTION:
;133.54.212.in-addr.arpa.       IN      NS

;; ANSWER SECTION:
133.54.212.in-addr.arpa. 3600   IN      NS      ns.broadnet.pt.
133.54.212.in-addr.arpa. 3600   IN      NS      ns2.broadnet.pt.

;; Query time: 667 msec