I have a dynamic ip addresser. I can register a domain with that. I have tried to register a domain name that is only displayed on the computers that are connected to my modem.
For others not.
This is domain name IP I have registered is 192.168.0.122
It seems to me that the problem is port 80 I tried to test ip address with open port check. But blocked there is a way to open it. Not in the firewall of the pc or modem I've tried.