fix IP syntax

config/nginx.conf

@@ -88,7 +88,7 @@ http {
             allow 127.0.0.0/8;
             allow 10.0.0.0/8;
             allow 172.16.0.0/12;
-            allow 192.168/16;
+            allow 192.168.0.0/16;
             deny all;
             fastcgi_param SCRIPT_FILENAME $document_root$fastcgi_script_name;
             include fastcgi_params;