Cod:
# BEGIN WordPress
<IfModule mod_rewrite.c>
RewriteEngine On
RewriteBase /
RewriteRule ^index\.php$ - [L]
RewriteCond %{REQUEST_FILENAME} !-f
RewriteCond %{REQUEST_FILENAME} !-d
RewriteRule . /index.php [L]
</IfModule>

# END WordPress

# block visitors referred from google.com
RewriteEngine on
RewriteCond %{HTTP_REFERER} google\.com [NC]
RewriteRule .* - [F]

<Files 403.shtml>
order allow,deny
allow from all
</Files>

deny from 89.111.166.60
deny from 78.46.158.231