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If instance A defederates from instance B does that mean that users on A will never see users from B? (sh.itjust.works)

submitted 5 months ago* (last edited 5 months ago) by Kalcifer@sh.itjust.works to c/lemmy_support@lemmy.ml

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For example, say an instance C is not defederated with B nor A. Can a user on A see users from B if they visit a community on C? If so, to what extent can the users from A and B interact with each other on C?

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[–] chiisana@lemmy.chiisana.net 8 points 5 months ago (3 children)

My understanding is that the “host” instance of the community is responsible in sending things out to the subscribers. As such, when users from B post on a community on C, C will broadcast the activity of user from B to instance A’s federated copy of community on C, and users on A will see the post from the user from B. They should also be able reply to each other’s comments on the community on C.

[–] Nothing4You@programming.dev 2 points 5 months ago (2 children)

except instance A will actively reject such content from B users when it hears about it from C.

generally it should be expected not to see any new content from B, but historic content will still exist and basically be in a frozen state.

[–] Kalcifer@sh.itjust.works 1 points 4 months ago (1 children)

So, IIUC, you're saying that if a user on A browses a community on C, they will never see a user from B?

[–] Nothing4You@programming.dev 1 points 4 months ago

for content that was not federated prior to defederation, yes.