How to disconnect a local server from the Internet?

Question

Network administration

How can I isolate the local development server from the Internet so that the Internet does not know about it?

Answer 1

Force only the local network interface (127.0.0.1) to listen.
So port 80 will be open only for connections from the local machine.

Answer 2

he doesn't even know about it

Answer 3

The Elusive Joe Principle: The Elusive Joe is elusive because no one wants him.

Answer 4

htpasswd