Suggestions are outlined by @llaske @ #851 (comment)

It's important that http://box/sugarizer work across all scenarios including Intranets (http://192.168.0.x/sugarizer), OpenVPN (http://10.8.0.x/sugarizer) and of course WiFi hotspots (http://172.18.96.1/sugarizer) so that all can be used interchangeably and without hassle by teachers and students who shout http://box/sugarizer across the room (and over SMS/WhatsApp emergency support calls!)

Refs: #798 #814 #851 #888 #892