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DNS Issue

How should i resolve this issues :

http://www.intodns.com/geforce.com.au

WARNING: Looks like the parent servers do not have information for your TLD when asked. This is ok but can be confusing.

ERROR: One or more of your nameservers did not respond:
The ones that did not respond are:
203.30.165.148

Detail:
We have 3 Windows DNS server 2 (.50 (Primary) &.51 (secondary)) are on same subnet and .148(secondary) are different.
Windows firewall is already off and port 53 allow on firewall. if i am going to resolve primary DNS IP on .148 server i receive the error "Unable to Resolve FQDN" kindly review attach image.
.51 FQDN is resolve without any issue.

Any Suggestion?
unable-to-resolve.jpg
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Geforce
Asked:
Geforce
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1 Solution
 
Radhakrishnan RITCommented:
Hi,

Are you able to ping .50 from other server? Is the .50 server's DNS AD integrated? have you tried to remove and re-add?
Is the forwarders resolving fine?

Perform a nslookup against .50 address and host name and see it resolves? if not, it's missing some DNS entries somewhere in the zone.
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GeforceAuthor Commented:
Hi,

Thanks for the reply,
Yes i am able to ping .50 from .148 server.
No AD, Its a Windows web server 2008R2 .
No i didn't try to remove DNS server from .148 because it was working fine before and we just start to receive above errors.
No DNS Forwarder set.

I perform a nslookup against .50 from .148 server and error receive "Unknown can't fine .50: non-existent domain." nslookup against .51 is from .148 is working fine.

So what actually i am missing because i check the all the DNS entries and all three server entries are identical.
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Radhakrishnan RITCommented:
Hi,

Probably you are missing a host A record for that server. Create an A record for the hostname which pointing to the .50 address and see it's resolving fine?
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GeforceAuthor Commented:
Hi,

Host A record is already exist. i am using Google DNS (8.8.8.8/8.8.4.4) in my TCP/IP setting on .50 server and i am not able to resolve host name on .50 server. I think if i used my ISP DNS than problem will resolve. What you think??
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Radhakrishnan RITCommented:
Hi,

Yes, that's the issue lying here. I hope the .50 server is located in your internal domain? if so, you need to put the first DC's IP address as a primary DNS and additional DC as a alternate DNS addresses.

Always, put your ISP's DNS in forwarders list. So, remove the Google DNS from the network card adapter and put internal DNS servers's IP instead. Add the ISP's DNS, Google DNS in forwarders list.
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GeforceAuthor Commented:
Hi,

we don't have DC's. we are hosting company. .50 is our primary DNS server and .51/.148 is secondary DNS. I will try to put ISP DNS, if you have any other thought. kindly share with me, thanks for your support.
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MaheshArchitectCommented:
Does all 3 DNS servers are published on internet ?
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GeforceAuthor Commented:
Yes all three DNS servers are published on internet.
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MaheshArchitectCommented:
If you did nslookup from 50 server for itself, does it resolves, or here it gives you error ?

Since your 50 server points to Google DNS, where those another servers (148 and 51) points for DNS ?

Does 50 server resolves from 51 server ?

I think you can try by pointing both servers to Google DNS and then check, Then it should go in perfect order such as Root\TLD

Mahesh
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GeforceAuthor Commented:
Thanks Mahesh and Radhakrishnan for your support and valuable suggestion.
My issue has been resolved basically port 53 blocked on .148 server. now port is open and everything back to normal.
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GeforceAuthor Commented:
DNS port is block on my another server so i checked it and resolve the issue
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