So I'm running a website off my own server. I piggybacked off my dad's domain; I added subdomain, evamsharma.finosus.com, and pointed to our network IP, and set up port forwarding. But when I logged onto it this morning, our IP had changed. It has stayed stable before, but I guess my ISP uses DHCP. Anyway, I need to know how to point my domain at my router even when the IP is changing. I looked at No-IP, but I couldn't figure out how to use it with my existing subdomain without transferring the domain registration to No-IP, which I couldn't do because my dad needs that domain.]
What can I do about this?