title: Modify x-frame-options in apache2
body: <p>I want to use an iframe in my localhost web server (wamp).
  This iframe loads a form from a remote web server.</p>
  
  <p>I have access to the remote web server, it uses apache2 (<a href="https://help.ubuntu.com/lts/serverguide/httpd.html" rel="nofollow noreferrer">https://help.ubuntu.com/lts/serverguide/httpd.html</a>), and i modify its security.conf file and i load the module 'headers'.  </p>
  
  <p>I modify security.conf by this line (the ip is the ip of my local computer):<br>
  Header append X-Frame-Options "ALLOW-FROM http://localhost, http://172.18.48.120, 172.18.48.120"</p>
  
  <p>But when i test the changes, always says the same:<br>
  Refused to display 'http://externalURL.net/form.php' in a frame because it set 'X-Frame-Options' to 'sameorigin'.</p>
  
  <p>Any idea? Where's the problem?</p>