Create a .htaccess file within the installationroot of WHMCS with the following content:
[code]RewriteEngine On
RewriteCond %{QUERY_STRING} licensedebug
RewriteRule ^(.*)$ http://www.whmcs.com/members/verifydomain.php? [R=302,L][/code]
This will redirect anything with the „licensedebug“ string to the anonymous offsitecheck on WHMCS.com, without exposing your real Server IP’s behind Proxies for example.