The Anonymous Hacktivist group has been in many headlines this past year. Who are they? What did they attack? How do they communicate?

The Wireshark free network sniffer rolls out 1.6 release with advanced features.

BackTrack, an Ubuntu-based penetration-testing distribution, offers "major improvements" over previous releases, including support for 32- and 64-bit architectures, KDE 4, Gnome, and Fluxbox.

Snort is the de facto standard for open source network intrusion detection. The developer community has kept a fairly low profile for a couple of years, but extensions like Snorby, OpenFPC, and Pulled Pork have given the old hog a new lease on life.

Red Hat announces IBM, Accenture, Alfresco, Cisco, HP and Intel representatives are scheduled to deliver keynotes at the seventh annual Red Hat Summit and JBoss World, May 3-6, 2011 in Boston, Massachusetts.

If you need to monitor very large networks, you need powerful software. OpenNMS offers serious monitoring capabilities in a truly open source package.

Although you give up control of the underlying infrastructure when you use cloud computing, you can still maintain some control over security.

The Prelude security information management system receives both host- and network-based IDS messages and displays them in an easy web interface. We show you how to set it up.