Where do I need to put the external ISP DNS Server address information

EBIZ-Mark
EBIZ-Mark used Ask the Experts™
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Hi,

We have a Windows Server 2003 Active Directory.  We have Primary and Backup domain controller.
I am told that both have been set up to share certain tasks on the network, including login scripts, DNS etc.

Our internal network runs on 192.168.0.xxx and our ISP DNS servers run on 135.196.0.x

DHCP is setup on our Primary AD controller.

Much of the AD was set up by a 3rd party, and we were checking a few things recently and now have the following question.

Where should the external ISP DNS server information be placed ?

They are NOT listed in the DHCP server setup, so the clients will only list our internal 192.168.0.5 and 192.168.0.7 DNS servers.

It would appear that currently they are setup in the 'Forwarders' tab on the DNS Server properties.  However, the ISP DNS servers will not be able to resolve our internal addresses, so this sounds wrong to me ?
Looking at the Forwarders properties on the Primary AD,  our secondary DNS server is not listed.

Can someone advise ?

Many Thanks
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Hello,

one possibility is to use the dns from your isp in the forwarders list.
if a client asks your internal dns and there is no record for the asked host, your dns will forward it to your isp-dns and gives the answer back to your clients.

is this what you want?
Brian PiercePhotographer
Awarded 2007
Top Expert 2008

Commented:
Your ISPs DNS servers should olny be listed as forwarders, so your setup seems correct - thats the way its supposed to be. All of your machines, clients, servera and DNS servers should have your own DNS servers listed at the preferred and alternate DNS servers (either in the DNS servers tab in the TCP/IP properties, or congigured by DHCP). Only you internal DNS servers can resolve internal lookups, and external lookups are then forwarded to the ISPs DNS servers.
Brian PiercePhotographer
Awarded 2007
Top Expert 2008
Commented:
I made a few Typos there but to re-iterated - it seems like your setup IS CORRECT.

Your ISPs DNS servers should ONLY be listed as forwarders, thats the way its supposed to be. All of your machines, clients, servers and DNS servers should have your own DNS servers ONLY listed at the preferred and alternate DNS servers (either in the DNS servers tab in the TCP/IP properties, or congigured by DHCP).

Only you internal DNS servers can resolve internal lookups, and external lookups are then forwarded to the ISPs DNS servers.

Author

Commented:
Excellent Thanks.  I've raised the points to 500 and split 50/50

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