title: RSA key is not allowed
body: <p>I can't configure SSH key-authentication on my new VDS server. After I've done <code>ssh-copy-id</code> I still get password prompt for user.</p>
  <p>To debug I added <code>LogLevel DEBUG3</code> in <code>/etc/ssh/sshd_config</code> and restarted <code>systemctl restart sshd</code> and saw in logs <code>/var/log/secure</code> this message:</p>
  <blockquote>
  <p>RSA key is not allowed</p>
  </blockquote>
  <p>Why does this happen and how do I fix it?</p>