It is possible to obtain an overview of the remote Nginx web server's activity and performance by requesting the URL '/nginx_status'.
Nginx is a free open source, high-performance, reliable, scalable and fully extensible web server, load balancer and reverse proxy software. One of the important modules in Nginx is the ngx_http_stub_status_module module which provides access to basic Nginx status information via a “status page”. It shows information such as total number of active client connections, those accepted, and those handled, total number of requests and number of reading, writing and waiting connections.
If required, update Nginx's configuration file(s) to either disable stub_status or ensure that access is limited to valid users / hosts.