The default for federation is on these days (though your server will only federate with communities any user on your server has accessed, which is none by default). As these posts appear on your server, anyone will be able to see what content is being federated on the global timeline. That said, my server is receiving various communities I don’t believe I’m subscribed to, including ones that I’ve never even heard of. I’m not sure where those are coming from.
You can change the federation mode as instance admin; you can switch between blacklist (current default), whitelist (old default), or no federation at all (internal server only, maybe useful within companies?). Note that going whitelist-only will have an impact on the comments you’ll be able to see on your server.
The default for federation is on these days (though your server will only federate with communities any user on your server has accessed, which is none by default). As these posts appear on your server, anyone will be able to see what content is being federated on the global timeline. That said, my server is receiving various communities I don’t believe I’m subscribed to, including ones that I’ve never even heard of. I’m not sure where those are coming from.
You can change the federation mode as instance admin; you can switch between blacklist (current default), whitelist (old default), or no federation at all (internal server only, maybe useful within companies?). Note that going whitelist-only will have an impact on the comments you’ll be able to see on your server.