To install CSF, perform the following steps:
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    Log in to your server as the root user via SSH.
    Run the cd /root command to change to the root directory.
    Run the following command to download CSF:
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    wget https://csf.linux.com.hr/csf.tgz 
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    Run the tar -xzf csf.tgz command to decompress the downloaded file.
    Run the cd csf command to change to the csf directory.
    Run the ./install.cpanel.sh command to install CSF.
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To configure CSF, use WHM’s ConfigServer Security & Firewall interface (WHM » Home » Plugins » ConfigServer Security & Firewall). The installation script should enable the correct ports in CSF, but we recommend that you confirm this on your server.
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After you configure CSF, you must disable testing mode. To take CSF out of testing mode, perform the following steps:
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To use CSF, you must disable testing mode. Perform the following steps to take CSF out of testing mode:
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    Click Firewall Configuration.
    Change the value of Testing from ON to OFF.
    Click Change.
    Click Restart csf+lfd.
    Click Return.
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