Installing and Configuring ConfigServer Firewall : CSF

CSF is generally considered a more advanced firewall as there are more configuration options compared to other firewalls, while still being simple enough to install and configure that even novice administrators can use it.

This article demonstrates how to install and configure the CSF (configserver) firewall. CSF can be used on a wide range of Linux systems, including those running cPanel. 
rm -fv csf.tgz
tar zxf csf.tgz
cd csf
If you have APF + BFD you will need to disable it, you can use the following to do so:
To configure CSF modify the config files in /etc/csf/ – or if you are running WHM you can modify the CSF settings in there. By default CSF opens the standard cPanel ports.

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