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I have Unbound cache DNS server which is working fine but today I found that it fails to resolve certain domain name which is perfectly resolve by google DNS server.

According to my knowledge possibilities could be,

  1. Nameserver of that domain blocking us?
  2. I was denying some domains due to DNS attacks, and is this one of them?
  3. Network issue?

I'm very new to Unbound and like to find out how can I troubleshoot these cases.

Any help appreciate!

  • Without giving any example of the domains with problems it is kind of hard to help you... You are not even saying which version of Unbound... – Patrick Mevzek May 24 '18 at 2:16

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