By default, instances can connect with any other instance, but admins can block instances. The connection is made when a user on that instance subscribes to a community on a different instance. You can definitely run your own instance and just disable sign-ups.
By default, instances can connect with any other instance, but admins can block instances. The connection is made when a user on that instance subscribes to a community on a different instance. You can definitely run your own instance and just disable sign-ups.
https://join-lemmy.org/docs/administration/federation_getting_started.html