If you want any further info on this popular fork, join his Discord channel. He's very responsive and helpful. There's a few guys there that know the ins and outs of it all so maybe pop across there for a quick chat? And always test it out on a non production server first with data that's not important, or a copy of something you'll be running.I believe CSF firewall was donated to the open source community, there are a few projects but I believe the official project can be found here:
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GitHub - Aetherinox/csf-firewall: ConfigServer Security & Firewall (CSF) - Robust linux iptables/nftables firewall & free ipset blocklist service.
ConfigServer Security & Firewall (CSF) - Robust linux iptables/nftables firewall & free ipset blocklist service. - Aetherinox/csf-firewallgithub.com
Documentation here:
ConfigServer Firewall - ConfigServer Security & Firewall
docs.configserver.dev