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Firewalls serve as essential barriers that control the flow of outbound and inbound traffic to and from a system or network. Linux, with its robust security model, offers robust tools for firewall management, one of the most popular being iptables. This blog post will walk you through setting up a basic firewall configuration using iptables. We'll cover how to install iptables on various Linux distributions and dive into some fundamental rules to get your firewall up and running. iptables is a user-space utility program that allows a system administrator to configure the IP packet filter rules provided by the Linux kernel firewall, implemented as different Netfilter modules.