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A question about defederation (lemmy.dbzer0.com)

submitted 1 year ago by [email protected] to c/[email protected]

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say there are three instances, A, B and C. if A is not federated with B, users from those two instances can't interact (right ?) but what if both are federated with C ? would both indirectly be able to interact ? if there is a post on instance C and a user from B comments on it, would that comment be visible on all three instances ?

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[–] scottyjoe9 8 points 1 year ago* (last edited 1 year ago) (3 children)

~~Yes, comments from users on instances A and B on a post on C are visible to users on all three instances. De/federation is a way for admins of a specific instance to control which users can interact with posts on their instance. Eg: beehaw defeds sh.itjust.works so users from sh.itjust.works cannot interact with posts on beehaw. Users from both instances can interact with each other on posts on lemmy.world though.~~

~~Edit: In reality, beehaw has defederated both sh.itjust.works and lemmy.world. In my theoretical example, only sh.itjust.works has been defederated.~~

EDIT: I actually tested it and I'm wrong! I logged into my beehaw alt account and came to this thread but I can't see this comment as it's from sh.itjust.works. Because my comment is hidden, I also couldn't see the thread attached to this comment section so the comment thread looked empty.

Sorry for confusion.

[–] [email protected] 5 points 1 year ago (1 children)

I was under the impression that A won't see comments of B even if posted in a community in C

[–] scottyjoe9 1 points 1 year ago

You are correct, sorry. I've edited my post.

[–] Quill7513 4 points 1 year ago (1 children)

(except for that Beehaw is also defederated from lemmy.world)

[–] scottyjoe9 5 points 1 year ago (2 children)

Shit, bad choice of third instance... Who hasn't beehaw defederated?

[–] Quill7513 3 points 1 year ago

Basically, every major instance that isn't sh.itjust.works, lemmy.world, lemmygrad.ml, or exploding-heads. They moderate in favor of "federate by default, defederate if it becomes a problem, refederate if the problem is addressed"

[–] [email protected] 1 points 1 year ago* (last edited 1 year ago)

Lemmynsfw.com is not defederated from beehaw.

Edit: don't ask me how I know.

[–] [email protected] 2 points 1 year ago (1 children)

Wait, so if I am from A and comment on a post on B and a user@c from C (which A has defedrated) comments on my comment, I get a message/notification indirectly from user@c via B?

So defederation blocks direct interaction but not discourse on "neutral ground (B in this case)"?

[–] scottyjoe9 2 points 1 year ago (2 children)

Nevermind, see my edit - I was wrong.

[–] [email protected] 2 points 1 year ago (1 children)

I see, thanks for testing it, I'm a bit disappointed though (with lemmy, I mean)

[–] scottyjoe9 3 points 1 year ago

Honestly, I don't like this either. It's definitely unfortunate.

[–] [email protected] 1 points 1 year ago

I think it depends. Not entirely sure though. Now given the context of Lemmy right, you can certainly post to instance C from both A and B. Even if your instance (either A or B) will not fetch messages from each other (due to not federating) you can always go see the messages through instance C (not logged in). That probably works for all defederation scenarios but that is also a very loosely defined interaction as both parties will have to do the same.

A diplomatic answer I know.