May be a bug.

[Mark_Andrews at isc.org]

> 
> I would say this is a bug, but it may be just because of the different
> versions.
> I am doing a reverse lookup and it happens to be a new thing with a CNAME in
> the reverse that then points to the PTR record.
> 9 version returns the PTR the 8 version doesn't.  Version 8 might not
> support such a thing.

	You asked two different questions (ptr vs any) which explains
	the differences in the answers.

	Mark

> 
> This is on a linux RedHat 7.2 bind-utils-9.1.3-4
> ; <<>> DiG 9.1.3 <<>>
> $ dig @10.128.52.105 -x 12.110.17.2
> ;; Got answer:
> ;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 5420
> ;; flags: qr rd ra; QUERY: 1, ANSWER: 2, AUTHORITY: 2, ADDITIONAL: 2
> 
> ;; QUESTION SECTION:
> ;2.17.110.12.in-addr.arpa.      IN      PTR
> 
> ;; ANSWER SECTION:
> 2.17.110.12.in-addr.arpa. 172683 IN     CNAME
> 2.0/26.17.110.12.in-addr.arpa.
> 2.0/26.17.110.12.in-addr.arpa. 86283 IN PTR     slc.Ingenix.Com.
> 
> ;; AUTHORITY SECTION:
> 0/26.17.110.12.in-addr.arpa. 86283 IN   NS      ns2.Ingenix.Com.
> 0/26.17.110.12.in-addr.arpa. 86283 IN   NS      ns3.Ingenix.Com.
> 
> ;; ADDITIONAL SECTION:
> ns2.Ingenix.Com.        0       IN      A       198.203.178.16
> ns3.Ingenix.Com.        0       IN      A       12.110.17.34
> 
> ;; Query time: 2 msec
> ;; SERVER: 10.128.52.105#53(10.128.52.105)
> ;; WHEN: Wed Apr  3 18:36:35 2002
> ;; MSG SIZE  rcvd: 160
> 
> 
> This is on windows 2000.
> C:\>dig @10.128.52.105 -x 12.110.17.2
> 
> ; <<>> DiG 8.3 <<>> @10.128.52.105 -x
> ; (1 server found)
> ;; res options: init recurs defnam dnsrch
> ;; got answer:
> ;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 6
> ;; flags: qr rd ra; QUERY: 1, ANSWER: 1, AUTHORITY: 4, ADDITIONAL: 4
> ;; QUERY SECTION:
> ;;      2.17.110.12.in-addr.arpa, type = ANY, class = IN
> 
> ;; ANSWER SECTION:
> 2.17.110.12.in-addr.arpa.  1d23h54m31s IN CNAME
> 2.0/26.17.110.12.in-addr.arpa.
> 
> ;; AUTHORITY SECTION:
> 12.in-addr.arpa.        6h33m48s IN NS  DBRU.BR.NS.ELS-GMS.ATT.NET.
> 12.in-addr.arpa.        6h33m48s IN NS  DMTU.MT.NS.ELS-GMS.ATT.NET.
> 12.in-addr.arpa.        6h33m48s IN NS  CBRU.BR.NS.ELS-GMS.ATT.NET.
> 12.in-addr.arpa.        6h33m48s IN NS  CMTU.MT.NS.ELS-GMS.ATT.NET.
> 
> ;; ADDITIONAL SECTION:
> DBRU.BR.NS.ELS-GMS.ATT.NET.  14h4m45s IN A  199.191.128.106
> DMTU.MT.NS.ELS-GMS.ATT.NET.  14h4m45s IN A  12.127.16.70
> CBRU.BR.NS.ELS-GMS.ATT.NET.  14h4m45s IN A  199.191.128.105
> CMTU.MT.NS.ELS-GMS.ATT.NET.  14h4m45s IN A  12.127.16.69
> 
> ;; Total query time: 0 msec
> ;; FROM: SLC7-3515378 to SERVER: 10.128.52.105
> ;; WHEN: Wed Apr 03 18:42:12 2002
> ;; MSG SIZE  sent: 42  rcvd: 227
> 
> 

--
Mark Andrews, Internet Software Consortium
1 Seymour St., Dundas Valley, NSW 2117, Australia
PHONE: +61 2 9871 4742                 INTERNET: Mark.Andrews at isc.org