Options -Indexes
DirectoryIndex index.php

<IfModule mod_rewrite.c>
RewriteEngine On
RewriteBase /
RewriteCond %{REQUEST_FILENAME} ^(bak/|dat/|tpl/.+\.htm$|(sys|mem)/tpl/.+\.htm$)
RewriteRule .* - [F]

RewriteCond %{REQUEST_FILENAME} !-f
RewriteCond %{REQUEST_FILENAME} !-d
RewriteRule .* /index.php [L]
</IfModule>