We are seeing some ugly reminders of what it means to have open federation, and a renewed interest in guidance on first steps for blocking bad actors. Connecting to 30,000 servers means opening yourself up to potential abuse and harassment.
The IFTAS Library has several resources that may be helpful when reviewing federation policy.
FediCheck - An IFTAS app that helps new #MastoAdmin block known sources: https://connect.iftas.org/library/iftas-documentation/fedicheck/
Domain, IP and Email Domain resources: https://connect.iftas.org/library/tools-resources/denylist-resources/
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