The ufw (uncomplicated firewall) represents a serious simplification to iptables and, in the years that it’s been available, has become the default firewall on systems such as Ubuntu and Debian ...

The Linux kernel itself has many functions built in for network routing, traffic shaping, bridging, virtual IP addresses, and just about anything else that a firewall needs to support.

This article describes the basic steps involved in developing a firewall from scratch, using tools in Linux. It is intended for newbies interested in learning about (Linux) firewalls. More important, ...

In today's open source roundup: Six GUI firewall management applications in Linux. Plus: Linux Lite 2.2 released, and the story of how Kali Linux was created.