Install plugin Disable XML-RPC Pingback.
sumber:
http://edbinx.com/2015/08/02/solve-jetpack-site-inaccessible-403-error-xmlrpc-php-wordpress/
Read more
sumber:
http://edbinx.com/2015/08/02/solve-jetpack-site-inaccessible-403-error-xmlrpc-php-wordpress/