How to organize access to trusted devices?

Question

linux

Raised the server, I am studying web technologies, on the server there is a site for personal use, a database. Worth ubuntu server, lamp. In order to protect myself, I enabled authorization on htaccess, and allowed access only to two devices with a static ip. You also need to log in from the phone, and it has a dynamic IP. Actually the question is, how to protect yourself correctly and open access to a device with a dynamic IP?

Answer 1

VPN, ssh port forwarding or ssh + socks proxy, https + basic auth
However, it is not entirely clear what actions you want to do from the phone.

Answer 2

do Basic Auth