Upload php firewall to your root of site server etc
Add this into your index.php
Code:
define('PHP_FIREWALL_REQUEST_URI', strip_tags( $_SERVER['REQUEST_URI'] ) );
define('PHP_FIREWALL_ACTIVATION', true );
if ( is_file( @dirname(__FILE__).'/php-firewall/firewall.php' ) )
include_once( @dirname(__FILE__).'/php-firewall/firewall.php' );
//Deactive PHP Firewall
define('PHP_FIREWALL_ACTIVATION', false);