Re: It's not "browsing" anymore..
"Can you do https to a 192. address?"
"Yes, provided whatever equipment is on that address supports https, but to the best of my knowledge you can't buy a certificate for it from any legitimate certificate provider,"
Certificates are for domain names, not IP addresses. You could for example, hang a web server off an external IP, and a free domain name from afraid.org, for long enough to get a valid free Lets Encrypt certificate, then stick that domain name in your internal hosts file/s, pointing to your internal 192. address. Done, dusted, accepted by all browsers. Probably pointless getting a paid certificate for this sort of thing, but you could do that to.