yum install perl-libwww-perl.noarch perl-Time-HiRes

wget https://download.configserver.com/csf.tgz
tar zxfv csf.tgz

cd csf
sh install.sh

cd /usr/local/csf/bin/
perl csftest.pl

You should get the following:

RESULT: csf should function on this server

systemctl stop firewalld
systemctl disable firewalld

cd /etc/csf/
vim csf.conf

Change TESTING = “1” to TESTING = “0”

systemctl start csf
systemctl start lfd
systemctl enable csf
systemctl enable lfd