title: PowerDNS works only on local
body: <p>So. The PowerDNS 3.3 as salve works only on local.
  (Also there is a nginx which works fine)</p>
  
  <p>This work good</p>
  
  <pre><code>dig example.com A @127.0.0.1
  </code></pre>
  
  <p>But this not (slave server)</p>
  
  <pre><code>dig example.com A @ns2.example.com
  ;; global options: +cmd
  ;; connection timed out; no servers could be reached
  </code></pre>
  
  <p>I've tried with IP of ns2.example.com, but no good result anything.</p>
  
  <p>Where the problem might be?</p>