server {
	listen 80;
	server_name _;
	root /path/to/codeigniter;
	index  index.php index.html index.htm;
	charset utf-8;

	location / {
		if (-f $request_filename) {
			expires 30d;
			break;
		}
		if (!-e $request_filename) {
			rewrite ^(.*)$ /index.php?q=$1 last;
		}
	}

	location ~ application/.* { deny all; }
	location ~ system/.* { deny all; }
	location ~ /\.ht { deny all; }

	location ~ \.php$ {
		fastcgi_pass   127.0.0.1:9000;
		fastcgi_index  index.php;
		fastcgi_param  SCRIPT_FILENAME $document_root$fastcgi_script_name;
		fastcgi_intercept_errors on;
		include        fastcgi_params;
	}
}