<IfModule mod_rewrite.c>
RewriteEngine On
RewriteCond %{HTTP_HOST}@@%{HTTP_REFERER} !^([^@]*)@@https?://\1/.*
RewriteRule \.(db|zip?)$ - [F]
RewriteCond %{REQUEST_FILENAME} !-f
RewriteCond %{REQUEST_FILENAME} !-d
RewriteRule (.*)$ index.php?request=$1 [QSA,NC,L]
</IfModule>