How to Enable/Disable CSF firewall and LFD
How to Enable/Disable CSF Firewall (Configserver security and firewall) on a cPanel Server
CSF is a most commonly used advanced firewall to secure Linux servers. It is better to keep the firewall enabled on the server because it will protect the server from external attacks. You can enable/disable the firewall either from frontend (WHM) or from server backend (SSH). Follow the below steps to Enable/disable CSF firewall.

3. Click on ‘ConfigServer Security & Firewall’ under ‘Plugins’
Steps to Enable/Disable server firewall on a cPanel/WHM Server (Frontend)
1. Log in to WHM (Webhost Manager) as ‘root’
2. Search for ‘ConfigServer Security & Firewall’ in WHM search bar

Search CSF in WHM
3. Click on ‘ConfigServer Security & Firewall’ under ‘Plugins’
Home » Plugins » ConfigServer Security & Firewall
4. Click on ‘Firewall Enable’ to Enable CSF and LFD
Firewall Enable = Enables csf and lfd if previously Disabled
5. Click on ‘Firewall Disable’ to Disable CSF and LFD
Firewall Disable = Completely disables csf and lfd

Enable and Disable CSF and LFD
Commands to Enable/Disable CSF firewall and LFD
1. Log into your Linux Server as ‘root’ user
2. Type ‘csf -x’ command to Disable CSF and LFD
3. Type ‘csf -e’ command to Enable CSF and LFD
[root@server ~]# csf -x
csf and lfd have been disabled
csf and lfd have been disabled
[root@server ~]# csf -e
csf and lfd have been enabled