A properly configured firewall is one of the most important aspects of overall system security. FirewallD is a complete firewall solution that manages the systems iptables rules and provides a D-Bus interface for operating on them. Starting with CentOS 7, FirewallD replaces iptables as the default firewall management tool. Rationale The Linux kernel's netfilter framework host-based firewall can protect against threats originating from within a corporate network to include malicious mobile code and poorly configured software on a host. Audit Run the following command to ensure firewalld is installed rpm -qa | grep firewalld rpm -qa | grep iptables Remediation Run the following command to install firewalld and iptables yum -y install firewalld iptables Impact Changing firewall settings while connected over the network can result in being locked out of the system.

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Run the following command to install firewalld and iptables yum -y install firewalld iptables