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The firewall is essential for controlling the flow of network traffic in and out of the Linux server. It enables users to control incoming network traffic on host machines by defining a set of firewall rules. It must be enabled on production servers facing the Internet, to protect those servers from unauthorized access. This is one of those security features that ensures your system security at network level. In this guide, we’ll show you how to add, remove, enable, and disable firewalld rules & zones.
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