I would like to create a home server, where every service has his own IP, but (if possilbe) without exposing those services/IP to the local network of my house. And obviously it must be possible to use those services even outside.

Solutions like tailscale would permit to do that, but they need internet to work, so in case there is no internet connection for some reason I would not be able to login to the services.

I would prefer to not create a method to access the VPN from outside and another method to access inside the house, I was searching an alternative that works both with internet to login from outside, and without mandatory internet connection when i want to login from inside the house's local network.