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Packet Sniffing Basics

By Adrian Hannah 

Imagine this: you're sitting in your local coffee shop sucking down your morning caffeine fix before heading into the office. You catch up on your work e-mail, you check Facebook and you upload that financial report to your company's FTP server. Overall, it's been a constructive morning. By the time you get to work, there's a whirlwind of chaos throughout the office. more>>

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A Primer to the OAuth Protocol

By Adrian Hannah 
OAuth uses digital signatures rather than the “Basic” authentication method used by the HTTP protocol. more>>

Paranoid Penguin - DNS Cache Poisoning, Part II: DNSSEC Validation

By Mick Bauer 
Configure your DNS server to check zone signatures using DNSSEC. more>>

Linux Distro: Tails - You Can Never Be Too Paranoid

By Michael Reed 

Tails is a live media Linux distro designed boot into a highly secure desktop environment. You may remember that we looked at a US government distro with similar aims a few months ago, but Tails is different because it is aimed at the privacy conscious “normal user” rather than government workers. more>>

Paranoid Penguin - DNS Cache Poisoning, Part I

By Mick Bauer 
Understand and defend against DNS cache poisoning. more>>

Security Monitoring and Enforcement with Cfengine 3

By Aleksey Tsalolikhin 
Cfengine is well known as a powerful system configuration management tool, but did you know you also can use it to secure your systems? more>>

Build a Better Firewall-Linux HA Firewall Tutorial

By Mike Horn 
Tired of maintaining your expensive commercial firewalls? Check out how combining Firewall Builder with a Linux HA firewall pair can provide a big solution at a low price. more>>

Virtual Security: Combating Actual Threats

By Jeramiah Bowling 
Learn how to secure your virtual environment from every angle. more>>
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Live-Fire Security Testing with Armitage and Metasploit

By Raphael Mudge 
Armitage and Metasploit let you attack your network like skilled criminals. Use these attacks to evaluate your security posture. more>>

Interview with a Ninja, Part II

By Mick Bauer 
Mick continues chatting with a figurative and literal hacker ninja. more>>

Interview with a Ninja, Part I

By Mick Bauer 
Mick chats with a highly skilled, highly ethical system cracker. more>>

Back from the Dead: Simple Bash for complex DdoS

By Greg Bledsoe 

If you work for a company with an online presence long enough, you'll deal with it eventually. Someone, out of malice, boredom, pathology, or some combination of all three, will target your company's online presence and resources for attack. more>>

Building a Transparent Firewall with Linux, Part V

By Mick Bauer 
Build a transparent firewall using an ordinary PC. more>>

Introduction to Forensics - A Report from Southwest Drupal Summit

By Steven Evatt 

What do you do once you realize one of your servers has been compromised? I recently had the opportunity to hear Linux Journal's own Kyle Rankin give a very impressive talk covering this situation at the Southwest Drupal Summit in Houston, Texas. more>>

Building a Transparent Firewall with Linux, Part IV

By Mick Bauer 
Arm your stealth firewall with a custom iptables script. more>>
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