Iptables even permit the creation of custom rules for specific services or applications, granting you greater flexibility in managing your network. Establishing these rules for incoming and outgoing network traffic gives you complete control over the packets allowed through or blocked from entering or leaving your system based on source and destination addresses, ports, and other criteria. These tables contain chains of rules for handling network traffic packets. Netfilter modules are used to implement the firewall, which contains filters organized into various tables. It can be used for managing network traffic efficiently. It is a crucial tool for Linux users as it offers a robust firewall to safeguard against malicious attacks. The Linux kernel firewall can be configured by system administrators using iptables, a user-space utility program.
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