Bind response

[David Forrest]

On Tue, 1 Jun 2010, Matus UHLAR - fantomas wrote:

> On 01.06.10 14:16, rams wrote:
>> I queried for cname domain against bind 9.6.X and got the following response
>> C:\Documents and Settings\rameshb>dig @localhost cname.td3497.com mx
>> ; <<>> DiG 9.6.1-P1 <<>> @localhost cname.td3497.com mx
>> ; (1 server found)
>> ;; global options: +cmd
>> ;; Got answer:
>> ;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 681
>> ;; flags: qr aa rd; QUERY: 1, ANSWER: 1, AUTHORITY: 0, ADDITIONAL: 0
>> ;; WARNING: recursion requested but not available
>> ;; QUESTION SECTION:
>> ;cname.td3497.com.              IN      MX
>> ;; ANSWER SECTION:
>> cname.td3497.com.       86400   IN      CNAME   .
>> ;; Query time: 15 msec
>> ;; SERVER: 127.0.0.1#53(127.0.0.1)
>> ;; WHEN: Mon May 31 14:10:32 2010
>> ;; MSG SIZE  rcvd: 47
>>
>> Here why authority section is not returned? Actually authority section
>> should be returned with SOA right?
>
> For CNAME answers, the authority for destination (.) is returned and
> authority is returned if it's known and configured.

And here it is known to be NXDOMAIN when the server is recursive:

[drf at maplepark ~]$ dig cname.td3497.com. any

; <<>> DiG 9.7.0-P2 <<>> cname.td3497.com. any
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NXDOMAIN, id: 6782
;; flags: qr rd ra; QUERY: 1, ANSWER: 0, AUTHORITY: 1, ADDITIONAL: 0

;; QUESTION SECTION:
;cname.td3497.com.		IN	ANY

;; AUTHORITY SECTION:
com.			864	IN	SOA	a.gtld-servers.net. 
nstld.verisign-grs.com. 1275386123 1800 900 604800 86400

;; Query time: 0 msec
;; SERVER: 192.168.102.9#53(192.168.102.9)
;; WHEN: Tue Jun  1 04:56:13 2010
;; MSG SIZE  rcvd: 107

-- 
David Forrest 
Maple Park Development Corporation
St. Louis, Missouri