title: DNS configure issue with cloudflare
body: <p>Environment:
  1.VPN Server: Amazon EC2 Ubuntu
  2.DNS: cloudflare</p>
  
  <hr>
  
  <p>I've setup a VPN Server on EC2 Ubuntu(Apache2.4 installed on the same machince),</p>
  
  <p>dns setting in /etc/ppp/pptpd-options as following:</p>
  
  <pre><code>ms-dns 8.8.8.8
  ms-dns 8.8.4.4
  </code></pre>
  
  <p>At this point,I'm able to connect the vpn by elastic IP or public-DNS given by aws.</p>
  
  <p>However, I want to connect by my domain name(host name as: vpn.mydomain.org).I'm using cloudflare as my dns server.
  The followings are what i did.
  Cloudflare dns setting:</p>
  
  <pre><code>Type Name value 
  A    vpn  54.x.x.x
  A    www  54.x.x.x  
  </code></pre>
  
  <p>After configuring like this, I can't connect vpn.mydomain.org as a vpn.
  When I put vpn.mydomain.org in the browser, it shows my website.
  I guest it's port miss configured. What should I do to make it right?</p>
  
  <p>ps. For my security group rule, port 1723 is opened.</p>