Simple nginx reverse proxy with extra headers.

gistfile1.pl

server {
  listen 1.2.3.4:80;
  server_name railsapp.example.com;
  location / {	
	proxy_set_header  Host  $host;
        # So the original HTTP Host header is preserved
	proxy_set_header  X-Real-IP $remote_addr;
        # The IP address of the client (which might be a proxy itself)
	proxy_set_header  X-Forwarded-For $proxy_add_x_forwarded_for;
        # The IP address in the HTTP X-Forwarded-For header (which would be the 'origin' client).
	proxy_pass  http://rails_application;
  }
}

Can you please provide a working example of this active on a remote location? I want to fetch the remote address on my application through javascript. The application is deployed on the remote host here, and that remote host is proxied by a reverse proxy server (setup through nginx).