It's self-contained by default and as you follow outside users it starts receiving their posts and so on. You don't have to participate in the whole fediverse.
My /etc/resolv.conf currently uses
options attempts:1 timeout:1 max-inflight:1
nameserver 127.0.0.50
There is nothing listening on 127.0.0.50 and iptables does not permit outbound connections.I am just wondering why is it such a hard requirement for you to stop other people to follow someone else that is not part of your server? Costs?
I am the crazy bold one of the group and the canary in the coal mine. You won't see any of my friends interacting on this or any other social site. I on the other hand email and make phone calls to everyone at every level of government, C-levels in corporations, investors, military leaders, scientists, influencers, etc...