A common error clients come across after initially installing the Cnfig Server Security and Firewall, or CSF, is receiving the error message
*WARNING* URLGET set to use LWP but perl module is not installed, reverting to HTTP::Tiny
The problem is easy to fix. Just login as root via SSH and run the following command
yum install perl-libwww-perl net-tools perl-LWP-Protocol-https
The error should now be gone and you can now enjoy the full functionality of CSF.