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Open Source Tool of March: ZoneMinder


For January and February, we chose some of the staples of open source security (GnuPG and Nmap) as the tool of the month. And deservedly so; both have just celebrated their ten-year anniversary in the open source realm, a rare feat for any open source project, much less one founded on security. But for the month of March, we wanted to move ahead and change gears. This month's Open Source Tool is no newbie for sure, but we bet that most of you reading haven't heard of it. While most Linux security tools deal with digital security, this month's tool is one of the few to cross that divide; Welcome to Zone Minder, the Open Source Tool for March...

Open Source Tool of February: Nmap!


This February, the team at Linuxsecurity.com has chosen NMAP as the Open Source Security Tool of the Month! In January, we chose GnuPG in part because it had just celebrated its 10th anniversary. Well, it wasn't alone. As of this past December Nmap ("Network Mapper"), the free and open source utility for network exploration and auditing, celebrated its 10th Anniversary as well! And because of its popularity, chances are very good that you've already used NMAP for quite some time. Even if you have, it's always good to take a look at how it all got started and what it's all about...

Master's Student: A Quick and Dirty Guide To Kernel Hardening with GrSecurity


Our resident Master's student Gian Spicuzza chimes in this month with a great feature HowTo on Kernel Hardening! There are a number of ways to lock down a system, and RBAC (role based access control) is one of them. Read on to learn more about what makes RBAC so useful, and to read one of the best overviews on Low/Medium/High Security... The combination of the Linux kernel and GNU packages has always been regarded as a secure operating system, but can it be more secure? Kernel hardening is the answer to tightening up the Linux backbone. GrSecurity, a kernel patch for Linux, is one of the more popular approaches... One of the most significant feature is the addition of a role-based access control system (RBAC) that monitors what each user can execute based on their role and denies execution if they overstep their pre-defined rules.

Knock, Knock, Knockin' on EnGarde's Door (with FWKNOP)


Secret knocks have been used for purposes as simple and childish as identifying friend or foe during a schoolyard fort war. Fraternities teach these knocks as a rite of passage into their society, and in our security world we can implement this layer of security to lock down an SSH server. With this guide on FWKNOP by Eckie S. (one of our own), you are taken on an easy-to-follow process of securing your platform with your own client and server port knocking set-up. Installation, iptable Rules setup, configuring access for the client and server, and everything in between. Check it out!

IPTables HOWTO Updated Release


The aim of the iptables-tutorial is to explain iptables in a complete and simple way. The iptables-tutorial is currently rather stable, and contains information on all the currently available matches and targets (in kernel), as well as a couple of complete example scripts and explanations. It contains a complete section on iptables syntax, as well as other interesting commands such as iptables-save and iptables-restore. The tutorial has recently been under heavy scrutiny and updating, as can be seen in this, the latest version of the tutorial. It is now also available in bookform from Lulu.com. If you feel like contributing or donating to the author of this tutorial, please do buy the book! Thank you!   Oskar Andreasson

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