Strange resolver behavior

[Edwin Groothuis]

On Tue, Feb 12, 2008 at 07:09:37PM -0800, Xin LI wrote:
> > Yes, but it is the MX record querying it is complaining about.
> Well, so perhaps that they are different problems?
> 
> What I think is a problem is that attempting to resolve
> 'ps_other.a.shifen.com' gets "Unknown host", here is a quick testcase:

This is the output to ask the A record for it:

[~] edwin at k7>dig @ns2.a.shifen.com ps_other.a.shifen.com a    

; <<>> DiG 9.3.4-P1 <<>> @ns2.a.shifen.com ps_other.a.shifen.com a
; (1 server found)
;; global options:  printcmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 37047
;; flags: qr aa rd; QUERY: 1, ANSWER: 1, AUTHORITY: 0, ADDITIONAL: 0

;; QUESTION SECTION:
;ps_other.a.shifen.com.         IN      A

;; ANSWER SECTION:
ps_other.a.shifen.com.  1200    IN      A       202.108.22.46

;; Query time: 522 msec
;; SERVER: 220.181.27.59#53(220.181.27.59)
;; WHEN: Wed Feb 13 14:15:41 2008
;; MSG SIZE  rcvd: 55

Status on the sixth line is NOERROR (yay!) 


This is the output of the MX record:

[~] edwin at k7>dig @ns2.a.shifen.com ps_other.a.shifen.com mx

; <<>> DiG 9.3.4-P1 <<>> @ns2.a.shifen.com ps_other.a.shifen.com mx
; (1 server found)
;; global options:  printcmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOTIMP, id: 56357
;; flags: qr aa rd; QUERY: 1, ANSWER: 0, AUTHORITY: 0, ADDITIONAL: 0

;; QUESTION SECTION:
;ps_other.a.shifen.com.         IN      MX

;; Query time: 523 msec
;; SERVER: 220.181.27.59#53(220.181.27.59)
;; WHEN: Wed Feb 13 14:16:13 2008
;; MSG SIZE  rcvd: 39

Status on the sixth line is NOTIMP. That is the part that host fails
on.

Edwin

-- 
Edwin Groothuis      |            Personal website: http://www.mavetju.org
edwin at mavetju.org    |              Weblog: http://www.mavetju.org/weblog/