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Trick: Writing Linux firewall rules with IPTables |
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Sunday, 10 July 2005 |
The Linux kernel, since version 2.0, has included the capabilities to
act as a firewall. In those days, the kernel module was called ipfwadm
and was very simple. With the 2.2 kernel, the firewall module became
called ipchains and had greater capabilities than its predecessor.
Today, we have IPTables, the firewall module in the kernel since the
2.4 days. IPTables was built to take over ipchains, and includes
improvements that now allow it to compete against some of the best
commercial products available in the market. This guide will give you some background on IPTables and how to use it to secure your network.
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Tips and Tricks 
