Operating System : CentOS 7 or higher version's This guide will help you to strengthen your basic knowledge of firewalld service on how to use firewall-cmd command in RHEL/CentOS 7. If there is any modification done in the system zone configuration file it will be copied automatically to the /etc/firewalld/zones/. All the pre-defined zone rules are stored in two locations: The system specified zone rules are under '/usr/lib/firewalld/zones/' and user-specified zone rules are under /etc/firewalld/zones/. The default zone will be set to public and the associated network interfaces will be attached to the public if there is no modification done. Each zone is designed to manage traffic according to specified criteria. To take advantage of this design, the firewalld categorizes the incoming traffic into zones on interfaces defined by the source address. It is always recommended to use firewalld to manage your firewall service unless we have some specific reasons to continue using the classic iptables.Īs we know, Firewalld has been designed with a powerful filtering system and is also more flexible to handle firewall management. Using both (firewalld and iptables) together will mess up the system, as they are incompatible with each other. In order to use iptables we need to stop and disable the firewalld service. In CentOS 7 or higher versions, we can still use the classic iptables.
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