Is inX using exY as the primary DNS?
Then,they should be both on the same network and exY should be reachable by inX
since inX is on internal network.exY should have 2 or more n/w cards -one
internal and one external to fetch results of dns queries from ISP.
Now,clarify the below:
Firstly,where have u made the configuration for inX to look up for nameservice?
Who's is the nameserver to lokup for dns queries?
Are u changing the server to lookup at run-time,meaning at the prompt of
nslookup like
nslookup
>server exY.com
>
Is this what u r doing?
pl. clarify.
Vineeta
gary wrote:
> Dear all,
>
> I got some questions on dns as below:
>
> I got 2 DNS servers, inX is internal DNS server and exY is external DNS
> server
> inX is pointing to Y DNS as its pri DNS
> exY is pointing to ISP DNS as its pri DNS
>
> correct me if I'm wrong, let say, if my internal wkst, is pointing to inX as
> its dns server, whenever nslookup XXX from this wkst, it will use inX to
> resolve and if inX can't resolve it shd ask help from exY and if exY can't
> will ask from ISP dns... is this the way???
>
> but what I found from my machine is, whenver I did a nslookup will shown its
> pri dns server and with result as below:
> ~~~~~~~~~~~~~~~~~~~~~~~~~~~~
> [root@mail /]# nslookup www.visto.com
> Server: inX
> Address: inX ip address
> Name: www.visto.com
> Address: 206.79.140.202
> ~~~~~~~~~~~~~~~~~~~~~~~~~~~~
>
> and if I changed its pri dns to exY DNS server, the result as below:
> ~~~~~~~~~~~~~~~~~~~~~~~~~~~~
> [root@mail /]# nslookup www.visto.com
> Server: exY
> Address: exY ip address
>
> *** exY can't find www.visto.com: Non-existent host/domain
> ~~~~~~~~~~~~~~~~~~~~~~~~~~~~
>
> I don't know why by pointing to exY, it can't resolve ???
>
> Any advise on how dns work, if it have have more than 1 dns to use??
>
> Many thanks for help....
>
> best rdgs,
> gary
>
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