DNS server isn't responding to certain IPs

Question

Hi,
I have a laptop with DNS problem. It ping any internal ip but domain controller(my DNS server). if I change dns server to google's public dns, it works but I want to use my own dns server.
If i change IP address it works. If I give that IP address to another computer, the computer gives the same DNS error. So I figure out that this IP address is the problem and I have 3 IP addresses like this with the same problem.
How can I find out if My dns block that ip or How can resolve this issue?
Thank s in Advance.

Answer 1

Hi  Mugurlu ,
What do you mean by saying :” It ping any internal ip but domain controller(my DNS server). ” .
If you mean it can’t ping the DNS server .
We could check there is route from clients to DNS server .And there is reverse route from DNS server to the clients .The firewall of DNS server should allow the network traffic .
If you mean it can’t resolve names .
First we need to ensure the firewall on DNS server allow the network traffic between server and the specific addresses .
Then we could use network monitor on DNS server to check if the query packets reached or not .
If not reached , we could check if there is route from clients to DNS server .
If reached and server responded ,we need to ensure there is route from DNS server to clients .Then we could use Nslookup on client to analyze the process .Open
Command Prompt ,type nslookup and type
set d2 .Then type a name ,we could find out the problem through the process .
If server doesn't respond ,we could enable debug logging on DNS server to analyze the process .Open
DNS Manager ,right click on DNS server and click Properties .On
Debug Logging tab ,select the box .
Here is the guide for Nslookup :
Nslookup :
https://technet.microsoft.com/en-us/library/cc940085.aspx
Best Regards,
Leo
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