- Another try to have Nginx listen to both IPv4 and IPv6 addresses without conflicting.

templates/nginx/sites-enabled/stub_status

 server {
-    listen [::]:80;
+    listen 80;
+    listen [::]:80 ipv6only=on;
     server_name stub_status;
     {{ "stub_status" if nginx["version"]|version_compare("1.7.5", ">") else "stub_status on" }};
 }