The Linux kernel includes some of the most powerful and flexible firewall code in any general-purpose operating system. This code is called Netfilter, though most of us refer to it by the name of its ...

Many enterprise networks require redundant HA (High Availability) infrastructure for key systems like network firewalls. This article demonstrates how you can use a combination of open-source packages ...

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In this Recipe, I'll explain both the options for firewall protection and the differences between hardware and software implementations. By the end, you should be able to point a client to the ...

The firewall as a layer 4 packet-inspection device has reached maturity. Although not every network requires high-end LAN switching gear, every Internet-connected network needs a firewall, if only to ...

Your Linux PC is only as secure as the settings you choose to enable (or disable).

More and more networking pros need to familiarize themselves with Linux because the operating system underpins so many enterprise tools and platforms including software-defined networking and SD-WANs, ...