Using naxsi as a "circuit breaker"

I only know the basics of naxsi, but bare with me. I want to automatically have virtual hosts blocked when they are getting too many new requests. I can't find information on solving this particular problem with it. It might be that naxsi isn't even the best solution. I want to define virtual host

bitwasp htaccess

I've got a nice easy htaccess I need to convert to nginx. RewriteEngine On RewriteBase /bitwasp RewriteCond %{REQUEST_URI} ^system.* RewriteRule ^(.*)$ /index.php/$1 [L] # Checks to see if the user is attempting to access a valid file, #such as an image or css document, if this isn't true it sen