Your browser does not seem to support JavaScript. As a result, your viewing experience will be diminished, and you have been placed in read-only mode.
Please download a browser that supports JavaScript, or enable it if it's disabled (i.e. NoScript).
L
Found the answer:
The master server polls the storage node web server. (/fog/status/bandwidth.php?dev=eth-device-name)
If the master server is HTTPS enabled, the storage nodes must expose the APIs in HTTPS too.