Comments on How to Install CSF (Config Server Firewall) on Debian 12
CSF or Config Server Firewall is a Stateful Packet Inspection (SPI) firewall based on IPtables and Perl. it provides a daemon process that will monitor your services for failure authentication.
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By: slagroom
This blatantly deletes postfix from your debian system, if you have/use/prefer that! Quite bad. You should at the very least mention that for the apt install command.