Own cloud Internet connection

Own cloud shows me this

[quote]This server has no working Internet connection. This means that some of the features like mounting external storage, notifications about updates or installation of third-party apps will not work. Accessing files remotely and sending of notification emails might not work, either. We suggest to enable Internet connection for this server if you want to have all features.
The “Strict-Transport-Security” HTTP header is not configured to least “15768000” seconds. For enhanced security we recommend enabling HSTS as described in our security tips.[/quote]

One direction given to diagnose this is using cURL to see if it can access the page, but CURL is not installed on the drobo. How do I fix this.