I have two questions mainly:

  1. Is there an existing tool like this? Or maybe even a built-in way to check on a per instance basis if it’s currently federated with another instance or not?

  2. What’s the default state of an instance once it starts up? I’m guessing open to all, and defederation has to be an intentional choice?

Overall I’m just curious. I don’t have the capability to code something like this myself, but I’d be pretty interested to check on the links between instances as the Fediverse grows.

  • I don’t know if there’s a site like that, but there are tools for looking at defederation and federation of a given instance:

    1- In the main page of each instance there should be an “about” or “info” button that should contain a part with the list of blocked and limited instances. There could also be a “federation” or “instance” button.

    (although I think that I page that collects and gives easier access to these list would be a great resource to have)

    2- You can search #/Fediblock. There instance admins/mods (and also common users) from different instances and softwares of the fediverse publish news of defederation and blocking/muting and advise other instance admins/mods and common users to do the same.