Discover Firewalls News

Book: Designing and Implementing Linux Firewalls and QoS using netfilter, iproute, NAT and l7-filter

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Firewalls are used to protect your network from the outside world. Using a Linux firewall, you can do a lot more than just filtering packets. This book shows you how to implement Linux firewalls and Quality of Service using practical examples from very small to very large networks.

After giving us a background of network security, the book moves on to explain the basic technologies we will work with, namely netfilter, iproute2, NAT and l7-filter. These form the crux of building Linux firewalls and QOS. The later part of the book covers 5 real-world networks for which we design the security policies, build the firewall, setup the script, and verify our installation.

Providing only necessary theoretical background, the book takes a practical approach, presenting case studies and plenty of illustrative examples.

JavaScript Malware Strikes Firewalls

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All ports were open to the world and practically every application had holes in it. It was like the Wild West. Eventually application security became a big deal as more serious issues were uncovered and more commerce depended upon secure platforms. Network security was next on the scene. It made sense to build a single choke point for all security needs. It was slick because it could see all the packets in transit to and from your servers, and turn off all access to anything that had a known hole in it. Those were the good times. Times have since changed.

Cisco Flaws Leave Firewalls, VPNs Vulnerable

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Network routing and switching giant Cisco Systems has issued an alert for a potentially serious security flaw affecting multiple firewall products, warning that the bug could cause passwords to be changed without any user interaction.