nginx配置codeigniter

最近用codeigniter搞一个php项目，nginx不太熟悉，好不容易配置好了，记录一下。
以下为nginx配置

server {
        listen       9006;
        server_name  localhost;
        root   /opt/htdocs/site;
        autoindex on;
        index index.php;

        location / {

            try_files $uri $uri/ /index.php;

            location = /index.php {

                fastcgi_pass   127.0.0.1:9001;
                fastcgi_param  SCRIPT_FILENAME /opt/htdocs/site$fastcgi_script_name;
                include        fastcgi_params;
            }
        }

        location ~ \.php$ {
            return 444;
        }
  }

codeigniter配置做如下修改

$config['base_url'] = "";
$config['index_page']       = "";
$config['uri_protocol']     = "AUTO";