How to Set Up firewalld
[firewalld](https://firewalld.org/) is firewall management software which acts as a frontend for Linux’s in-kernel [nftables](https://netfilter.org/projects/nftables/index.html) or [iptables](https://netfilter.org/projects/iptables/index.html) packet filtering systems. In this guide, we'll show you how to set up a firewalld firewall for your server, and cover the basics of managing the firewall with the `firewall-cmd` administrative tool. Choose your server operating system below to get started.
CentOS
How To Set Up a Firewall Using firewalld on CentOS
How To Set Up a Firewall Using FirewallD on CentOS 7
Rocky Linux
How To Set Up a Firewall Using firewalld on Rocky Linux 9
How To Set Up a Firewall Using firewalld on Rocky Linux 8
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