CSF:
--------------------------------------------------------------
cd /usr/src
rm -fv csf.tgz
wget https://download.configserver.com/csf.tgz
tar -xzf csf.tgz
cd csf
sh install.sh

Next, test whether you have the required iptables modules:
perl /usr/local/csf/bin/csftest.pl

Configuration:
/etc/csf/csf.conf

Perl Modules:
# On rpm based systems:
yum install perl-libwww-perl.noarch perl-LWP-Protocol-https.noarch perl-GDGraph

# On APT based systems:
apt-get install libwww-perl liblwp-protocol-https-perl libgd-graph-perl

Uninstallation:
cd /etc/csf
sh uninstall.sh



CXS:
--------------------------------------------------------------
cd /usr/src
rm -f cxs*
wget https://download.configserver.com/cxsinstaller.tgz
tar -xzf cxsinstaller.tgz
perl cxsinstaller.pl ipv4
rm -fv cxsinstaller.*