In RHEL/CentOS 7/8 and Fedora, the iptables interface is being replaced by firewalld.
Source: Linux Today – UPDATED: How to Configure FirewallD in RHEL, CentOS, and Fedora
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In RHEL/CentOS 7/8 and Fedora, the iptables interface is being replaced by firewalld.
Source: Linux Today – UPDATED: How to Configure FirewallD in RHEL, CentOS, and Fedora