Download and install using: wget https://download.configserver.com/csf.tgz tar xfz csf.tgz cd csf sh install.sh
Update the following file with a trusted IP addresses
/etc/csf/csf.allow
Go ahead and disable testing mode
sed -i -e 's/TESTING = "1"/TESTING = "0"/g' /etc/csf/csf.conf
Once done, restart your firewall
csf -r
To add your IP address to a permanent allow list use:
csf -a 11.22.33.44
To block an IP address:
csf -d 11.22.33.44
Use following to see the lfd logs
tail -f /var/log/lfd.log