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Set two DNS, Private and Public in clients to query from

When I set local DNS on any NIC setting as primary DNS and try to resolve a public FQDN it simply doesn't find it unless I added to the private DNS even though I have a public DNS set up along with the private but as a secondary one.

Is there anyway to get public names that are not entered in the private DNS to resolve using the public DNS ?

for example, I have domain.local resolving to 192.168.1.240
and domain.public.com should resolve to something like xx.0.52.12
but public domain is not resolving!

My current DNS setting in the NIC are
192.168.1.170 < Local DNS server and primary
8.8.8.8 < Google DNS Server - secondary

thanks

ASKER CERTIFIED SOLUTION

Bruno PACI

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Mohammed Hamada

ASKER

Thanks for the detailed explanation, Right now my DNS Server has internet access in order to resolve and forward external DNS queries to internal clients.

Is there anyway that the DNS will work without internet and still resolve and forward external DNS queries to internal clients.

DarinTCH

if you dont have the capability to reach an external DNS ....it can not resolve an external DNS request

so the last DNS becomes 'the end of the line'
authoritative DNS is saying i have these 'machines' in my view...under me
if the DNS is not authoritative it must forward the request to someone else who can answer the request

once it 'visits' an external site it can learn where to send requests

and if you have more space than you will ever need you could try to store all the DNS info from a public DNS server (not a good idea)

Mohammed Hamada

ASKER

So in this case, Internet must be available in the DNS server for external DNS reach ?

Mohammed Hamada

ASKER

Thanks.

Bruno PACI

Hi again,

Not sure to really understand your last question... How the server could resolve external names without access to external DNS servers ?!?!! If this is your question the answer is NO, of course NO.

If your question is "how the internal DNS server can resolve SOME external names without access to external DNS servers" then the answer is yes it's possible. What you have to do is to create the DNS zone on your internal DNS server and create the requested record.
As an example, let's suppose I want my DNS internal server to be able to resolve one particular external DNS name (let's say www.mycompany.com should be resolved to 1.2.3.4).
I'll then create a new DNS zone named "www.mycompany.com" on my internal DNS server and in this zone I will create a new host (A) record with blank name and type the IP address 1.2.3.4.