title: DNS issue after upgrading to Ubuntu 16.04
body: <p>I recently upgraded my virtual machines to Ubuntu 16.04 LTS from 14.04 LTS and couldn't get DNS to work. </p>
  
  <blockquote>
    <blockquote>
      <p>nsloookup 
      ;; connection timed out; no servers could be reached</p>
    </blockquote>
  </blockquote>
  
  <p>Tried the following but still the issue is there:</p>
  
  <p><a href="https://willhaley.com/blog/resolvconf-dns-issue-after-ubuntu-xenial-upgrade/" rel="nofollow noreferrer">https://willhaley.com/blog/resolvconf-dns-issue-after-ubuntu-xenial-upgrade/</a></p>
  
  <p><a href="http://www.ubuntugeek.com/fix-for-dns-problems-after-upgrading-from-ubuntu-16-04-to-ubuntu-16-10.html" rel="nofollow noreferrer">http://www.ubuntugeek.com/fix-for-dns-problems-after-upgrading-from-ubuntu-16-04-to-ubuntu-16-10.html</a></p>
  
  <p>something to add here.</p>
  
  <p>ok something to add here. 
  I set up a tcp dump on the my machine with </p>
  
  <blockquote>
    <blockquote>
      <p>sudo tcpdump -n -i eth0 | grep xx.xx.xx.xx.53 (where xx.xx.xx.xx is the ip address of the proxy server)
      I don't get a response back as below</p>
    </blockquote>
  </blockquote>
  
  <p><code>
  21:29:55.150092 IP yy.yy.yy.yy.37459 &gt; xx.xx.xx.xx..53: 4219+ [1au] A? www.google.com. (43)
  21:30:00.150044 IP yy.yy.yy.yy.37459 &gt; xx.xx.xx.xx..53: 4219+ [1au] A? www.google.com. (43)
  21:30:05.150172 IP yy.yy.yy.yy.37459 &gt; xx.xx.xx.xx..53: 4219+ [1au] A? www.google.com. (43)
  </code></p>
  
  <p>Firewall rules seems to be fine.</p>
  
  <p>Any help would be greatly appreciated.</p>