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How does federation with new communities work?

I’ve seen that the instance owner has a whitelist and blacklist for their instance, but say that I make an instance of my own and want to federate.

Must each and every instance owner manually add me to the whitelist, or is there some kind of public database where I can add my instance and automatically be added to everyone’s whitelist?

hsl ,
@hsl@wayfarershaven.eu avatar

This is more of a support question, related to using Lemmy. Please see the sidebar for a list of communities that offer support. Removing under rule #3.

Candelestine ,

Wrote this awhile ago, to provide an overview of roughly how Lemmy works. Covered this question about halfway down if I remember right:

lemmy.world/post/583669

iByteABit OP ,

Perfect, thanks

WtfEvenIsExistence ,

Most big instances federate with everyone. Those with “allowlists only” are not very common. If you want to federate with one of those instances, you’ll just have to ask the admins.

Also, this is not a support community. (But I’m not a mod so I dont care)

iByteABit OP ,

This is not a support community

I was trying to find one but couldn’t so I came here, I can cross-post it if needed.

Most big instances federate with everyone

This is basically what I don’t understand, how would they federate with me if they don’t know I exist? Would I have to ask a big instance to federate with me first and then the rest would find me from there perhaps?

WtfEvenIsExistence ,

They don’t know you exist, but they don’t block you either. You would have to interact with the instance to be under “Linked Instances”. One way to establish a link is by finding a community on that instance you want to link by searching for them using this format:

!community

For example this community would be !asklemmy

You would need to manually do this for every community you want to see on your instance. If you never typed !asklemmy on your instance’s search box, your instance would never know that this community exists.

Or you can use a bot to automatially add them for you.

jungekatz ,
@jungekatz@hexbear.net avatar

I am wondering the same too!!

danielton ,
@danielton@lemmy.world avatar

By default, your instance will only know about communities on that instance and communities that users of that instance have intentionally subscribed to. Unfortunately, this causes problems for users of smaller instances unless the instance admins are running a federation helper bot, which basically scans remote instances for communities and adds them to the instance.

I found this out the hard way when I first tried Lemmy, since I picked a tiny instance due to the larger ones being overloaded in June. I had a hell of a time trying to subscribe to the communities for the new Lemmy apps I was trying out. I kept getting Community Not Found errors until I refreshed the page multiple times until it eventually found the community.

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