ioc.exchange is one of the many independent Mastodon servers you can use to participate in the fediverse.
INDICATORS OF COMPROMISE (IOC)
InfoSec Community within the Fediverse. Newbies, experts, gurus - Everyone is Welcome! Instance is supposed to be fast and secure.
The CIA has declassified a 1940s field manual on how to sabotage fascism. It's available for free from Project Gutenberg: https://www.gutenberg.org/ebooks/26184