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Shorewall

Shorewall, a free and open-source firewall software for Linux systems, provides a high-level tool for configuring Netfilter. It simplifies the process of creating sophisticated firewalls with simple configurations. Shorewall uses configuration files to define firewall rules, reducing the likelihood of human error compared to manual rule configuration. Syntax checks ensure that the settings are correct before they take effect. With its modular design that supports zones and macros, Shorewall allows administrators to manage complex networks by grouping interfaces and hosts into logical entities. This approach makes it easier for those unfamiliar with iptables syntax to create secure networking environments while providing advanced users with control over detailed rules when needed.

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