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Re:The unintended consequences of blocking IP addresses by pabs3 on Thursday December 29, 2022 @11:55PM (#34181945)
The OONI Project aims to provide tools for discovering such blockage, accepts submission of blockage info and does analyses of why the blockages occur:

https://ooni.org/

Re:The unintended consequences of blocking IP addresses by RajT88 on Friday December 30, 2022 @12:34AM (#34182159)
THIS /\

I posted already in the thread an OONI analysis of how Russian ISP's are blocking IP's. Super awesome stuff they do.