Managing CSF via WHM
You can manage csf from WHM >> ConfigServer Security&Firewall.
To check if any IP address has been blocked, enter the IP address at the textbox next to "Search for IP" and click on it.
To remove IP address from deny file, enter the IP address at the textbox next to "Remove Deny" and click on it.
To allow an IP address, enter the IP address at the textbox next to "Quick Allow" and click on it.
To deny an IP address, enter the IP address at the textbox next to "Quick Deny" and click on it.
To modify the firewall configuration, click on "Firewall Configuration", make the required changes and click on "Change" to save the configuration. To change the connection tracking limit, look for "CT_LIMIT", change the value for limit and save the configuration file. To enable ports, find the lines TCP_IN and TCP_OUT and specify the ports. To enable UDP ports, use options UDP_IN and UDP_OUT.