An Introduction to the Shorewall Firewall Tool
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              | Linux is well known for being a highly secure platform. One of the reasons for said security is the Netfilter system. For those that don’t know, Netfilter is a framework, provided by the Linux kernel, that allows for various networking operations, such as packet filtering, network address translations, port translation, and the ability to block packets from reaching specific locations. |  |  
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