title: FTP connection is not allowed by server name
body: <p>Today when I was testing the ftp connection to remove server it was printing an error saying <code>Host not found</code>.</p>
  
  <p>At client ftp program I have changed the <strong>ftp server</strong> from <code>ftp.example.com</code> to <code>server ip adress</code> and as result it works. Any advice on why it works with ip and not by ftp server name?</p>
  
  <p>Troubleshooting:</p>
  
  <ul>
  <li>pureFtp services is up and running</li>
  <li>firewall allows port 21</li>
  <li>Centos 4 is the OS of the remote machine</li>
  <li>DNS A entry exists correctly to ftp name</li>
  </ul>