3dpc on "Hit by an xmlrpc.php attack"

At another blog post I read that I could implement this code snippet in the .htaccess file. Any ideas which is best to implement?

<Files xmlrpc.php>
Order allow,deny
Deny from all
</Files>

http://antti.vilpponen.net/2013/08/26/how-to-mitigate-a-wordpress-xmlrpc-php-attack/