Install CSF Firewall

[Cantalupo]

Use commands

Separated list of commands so you can better control the CSF features (replace (IP)):

    CSF -g (IP)> Checks whether the searched IP is blocked
    csf -a (IP) "Reason - Your Name"> Adds an IP in the server whitelist. Use with caution and release only fixed IP
    csf -d (IP) "Reason - Your Name"> Blocks IP in firewall and add the comment in /etc/csf/csf.deny file
    CSF -Tr (IP)> Remove the temporary blocking of an IP
    CSF -Dr (IP)> Remove the definitive blocking an IP
    grep IP /var/log/lfd.log > Check the reason for a temporary lock

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