title: nginx proxy - how to allow connection from a specific ip
body: <p>I've installed nginx and set it up as a forward proxy (see attached nginx.conf)
  The server became overloaded and it seems like someone else was using it.</p>
  
  <p>is there a way to limit the nginx proxy to receive request only from specific ips?</p>
  
  <p>Please explain how I should change the nginx.conf to do it for ip 123.456.123.345</p>
  
  <pre><code>worker_processes  1;
  
  events {
      worker_connections  1024;
  }
  
  http {
      include       mime.types;
      default_type  application/octet-stream;
  
      sendfile        on;
      keepalive_timeout  65;
  
      gzip  on;
  
      server {
          listen       8080;
  
          location / {
              resolver 8.8.8.8;
              proxy_pass http://$http_host$uri$is_args$args;
          }
  
          error_page   500 502 503 504  /50x.html;
          location = /50x.html {
              root   html;
          }
      }
  }
  </code></pre>