Hi to all...
I was installed the MageFirewall Security extension....after installing it shows below code to be included...
To Enable firewall include the following line in index.php in your webroot directory after the following line of code "define('MAGENTO_ROOT', getcwd());"
require_once MAGENTO_ROOT.'/lib/firewall/firewall.php';
After done the above code and save...now i enter into my site it shows blank page error....how can i solve this...