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I have set up a DNS server using BIND on CentOS 7. By checking the DNS server in BuddyNS and using dig amraei.com it seems good and working.

Then I have also setup Apache and a virtual host for another domain involv.ir. Now the domain involv.ir is not accessible and replying to ping. If I try to trace it, I get this error:

:~$ mtr involv.ir
Failed to resolve host: Temporary failure in name resolution

While tracing DNS server using mtr amraei.com shows it's working properly.

How to troubleshoot this problem and check if it is DNS or Apache related?

Omid Amraei
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When you asked this question, there where no nameservers defined for involv.ir. According to intodns.com and your comment, this is now fixed.

Without NS records, nothing else can work.

You should fix the other issues reported by intodns, at the very least the ones in red.

Sven
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