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A Practical Guide to Ubuntu Linux by Mark G. Sobell

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Chapter 26. firestarter and iptables: Setting Up a Firewall

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The firestarter utility is a user-friendly, graphical front-end for iptables; iptables builds and manipulates network packet filtering (page 1052) rules in the Linux kernel. You can use firestarter, or iptables directly, to create a firewall that protects a system from malicious users and to set up NAT (Network Address Translation, ...

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