incorrect dns returned by public servers for our domain

[Gregory Machin]

Hi.

When I query my dns servers internally and directly from outside I get

[macgre at topnz15209-linux ~]$ dig @202.a.x.y mydomain.nz

; <<>> DiG 9.7.2-P3-RedHat-9.7.2-1.P3.fc13 <<>> @202.a.x.y mydomain.nz
; (1 server found)
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 2997
;; flags: qr aa rd ra; QUERY: 1, ANSWER: 1, AUTHORITY: 3, ADDITIONAL: 2

;; QUESTION SECTION:
;mydomain.nz.		IN	A

;; ANSWER SECTION:
mydomain.nz.	86400	IN	A	202.a.t.z

;; AUTHORITY SECTION:
mydomain.nz.	86400	IN	NS	mcvpdns01.mydomain.nz.
mydomain.nz.	86400	IN	NS	drvpdns01.mydomain.nz.

;; ADDITIONAL SECTION:
drvpdns01.mydomain.nz. 86400 IN A	202.a.x.z
mcvpdns01.mydomain.nz. 86400 IN A	202.a.x.y

;; Query time: 2 msec
;; SERVER: 202.a.x.y#53(202.a.x.y)
;; WHEN: Thu Feb 24 11:39:26 2011



When I query against opendns and google's public servers I get

[macgre at topnz15209-linux ~]$ dig @8.8.8.8 mydomain.nz

; <<>> DiG 9.7.2-P3-RedHat-9.7.2-1.P3.fc13 <<>> @8.8.8.8 mydomain.nz
; (1 server found)
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 45766
;; flags: qr rd ra; QUERY: 1, ANSWER: 1, AUTHORITY: 0, ADDITIONAL: 0

;; QUESTION SECTION:
;mydomain.nz.		IN	A

;; ANSWER SECTION:
mydomain.nz.	61371	IN	A	202.a.t.z

;; Query time: 170 msec
;; SERVER: 8.8.8.8#53(8.8.8.8)
;; WHEN: Thu Feb 24 11:41:32 2011
;; MSG SIZE  rcvd: 55


why are

;; AUTHORITY SECTION:
mydomain.nz.	86400	IN	NS	mcvpdns01.mydomain.nz.
mydomain.nz.	86400	IN	NS	drvpdns01.mydomain.nz.

missing ?

We a have users complaining that they cant resolve out dns servers,
and thus can't do lookups for services.

Our version of bind is 9.3.6-4.P1.el5_5.3

Thanks
G