title: MySQL error: Can't get hostname from your ip address
body: <p>I use my remote MySQL database during long time.</p>
  
  <p>But today I suddenly have found that I cannot connect to the database. I have got an error. </p>
  
  <blockquote>
    <p>"Can't get hostname from your ip address". </p>
  </blockquote>
  
  <p>I haven't changed anything in MySQL settings.</p>
  
  <p>What's the problem?</p>