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Linux Firewall - the Traffic Shaper


{LANG_NAVORIGIN} Firewall
By: Jeroen Wortelboer and Jan Van Oorschot, 03/23/2004



This article will look at ways for users to get more out of that faithful but somewhat dull firewall. In particular, we will look at traffic shaping, a technique that prevents high-bandwidth traffic like Napster from making other Internet applications, such as Web browsing and gaming, unusable. By making some simple adjustments to the Linux kernel, users can implement an effective traffic shaping setup that ensures that the Web traffic can flow smoothly, even when a lot of outsiders are busy working with your Napster store. By restricting certain types of traffic which may otherwise dominate the Internet link, firewalls can not only optimize bandwidth but can also serve as an effective tool against certain types of 'Denial of Access' attacks.

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