A common error clients come across after initially installing the Config Server Security ( CSF ) and Firewall, is receiving the error message, and you may receive this error when trying to run CSF:
*WARNING* URLGET set to use LWP but perl module is not installed, reverting to HTTP::Tiny
Run the following to install perl dependencies so it runs correctly:
yum install perl-libwww-perl net-tools perl-LWP-Protocol-https