You storage zone controller status can be checked remotely by checking the following Sharefile Monitoring URL https:///heartbeat.aspx
If the service is functioning you will see the following message
***ONLINE***
Uptime robot is a simple monitoring tool hosted in the cloud, it allows you to setup up to 50 monitors with a free account.
Once you have an uptime robot account you can create a new monitor which will report if your sharefile storage zone controller is accessible externally.