начинаю попорядку хитасес в корне ! - содержание вот
<IfModule mod_rewrite.c>
RewriteEngine On
RewriteBase /forum/
RewriteCond %{REQUEST_FILENAME} !-f
RewriteRule .(jpeg|jpg|gif|png)$ /forum/public/404.php [NC,L]
RewriteCond %{REQUEST_FILENAME} !-f
RewriteCond %{REQUEST_FILENAME} !-d
RewriteRule . /forum/index.php [L]
</IfModule>
RewriteEngine on
RewriteCond %{HTTP_REFERER} !^$
RewriteCond %{HTTP_REFERER} !^http(s)?://(www.)?cosmoeng.ru [NC]
RewriteRule .(jpg|jpeg|png|gif)$ - [NC,F,L]