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Name resolution problem

Our internal DNS servers (win2k3 & active directory integrated) are configured as forwarders to our ISP's DNS servers  for external name resolution. The client pcs get information about DNS servers from DHCP. When I try to access a  site xyz.com from any client machine it comes up with up message "Page cannot be displayed". However, if I use the IP address of our ISP DNS server in the TCP/IP properties of a client machine I can open the page. Any ideas why this is happening and can someone suggest a solution please?
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Cromwellhospital
Asked:
Cromwellhospital
1 Solution
 
mattedkCommented:
Is the xyz.com defined on your internal DNS server? (Would it happen to be your domain name?)
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kadadi_vCommented:
In DNS server management console properly configure the forward and revesrse lookupzone as your Ip range Nd ISP dns address are configured in forwarder tab ( as you already did) .On win2k3 server also primary dns address is self ip addres of the win2k3 server and alternative is ISP .Also client desktops also primary dns is local IP address of windows server.

Refer this also = http://support.microsoft.com/kb/814591



Regards,

V.K.
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CromwellhospitalAuthor Commented:
Hi mattedk
Our domain name is configured as "abc.xyz.com" hosted by our DNS servers. We also have a parent zone set up as "xyz.com".
The site I am having difficulty accessing is "test.xyz.com" hosted by another company and completely different IP address. May be this is what is causing the confusion. Any request for name resolution for "test.xyz.com" goes to our DNS server and once it sees the xyz.com part it does not forward it to ISP DNS and tries to resolve itself and since it cannot resolve it, it throws the error "page cannot be displayed".
Is there a way I can configure DNS to forward any request for ""test.xyz.com" to our ISP DNS server or suggest anyother possible solution?
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mattedkCommented:
Create a Split DNS setup, you can read a little about it here:
http://articles.techrepublic.com.com/5100-10879-6097830.html

Basically it involves simply adding test as a host under xyz.com and give it the "Real" external ip address.

And you are absolutely correct, that is what is causing your problems - as the server believes it owns that zone solely, why would it want to ask outside dns servers for help.
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Bill_FleuryCommented:
Split DNS is the proper way to fix this, but if you want a quick and dirty solution you can just put an A record on your DNS server to point to the IP you resolve from your ISP's DNS for the site.
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mattedkCommented:
Comment:
Basically it involves simply adding test as a host under xyz.com and give it the "Real" external ip address.

Should rephrase that, so it makes sense:
But you can simply add test as a host under xyz.com and give it the "Real" external ip address.
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