As I understand this solution, all I need is some computer with static IP. My ISP offers static IP, but I am required to have a wifi router on every Internet co

As I understand this solution, all I need is some computer with static IP. My ISP offers static IP, but I am required to have a wifi router on every Internet connection I have an access to, which might do creating such a home server not an easy task. A free (as beer) MITM service for having an ability to connect to some websites might be a great deal for not only this device but even for some older devices in my collection. But of course your link is not such a service.