firewalld is a high-level firewall rules management frontend utility. It does not directly handle packet filtering itself but relies on the nftables subsystem within the Linux kernel. firewalld is a dynamic, user friendly, firewall manager that can protect against threats originating from within a corporate network including malicious mobile code and poorly configured software on a host.
Solution
Run the following command to install firewalld # dnf install firewalld Impact: Installing the firewalld package alone does not change firewall behavior; rules take effect only after the service is enabled and a zone/policy is configured.