Eavesdropping on conversations on a LAN is easier than ever thanks to insecure VoIP installations. you don’t need to bug restaurant booths or tap phone lines – standard Linux tools are all a hacker needs.

WLANs give you Internet access without a bird’s nest of wiring. But if you don’t take security seriously, you might find yourself with uninvited guests.

Add security to your website with a one-time password system.

Don't let intruders crash your dance. We'll show you how to test your firewalls and intrusion detection systems with hping.

At the Niederrhein University future admins implement spam defense mechanisms by attracting the attention of the Viagra Mafia. The results are pertinacious blacklists and expert knowledge of methods for combating the menace.

This month we examine techniques for deploying and managing virtual systems.

This simple command-line tool helps you keep ahead of your virtual infrastructure.

A virtual appliance combines the benefits of virtualization with the simplicity of a single-service device. We show you how to roll your own virtual appliances with VWware Studio and SUSE Studio.

Rocks offers an easy solution for clustering with virtual machines.

Yes, you can do that with Linux… Even if you want to live in an open source world, it’s still full of Windows. This month we study strategies for Windows integration.

Linux clients sometimes need a little help to connect to Windows VPN servers.

Likewise Open provides smooth integration with Active Directory environments. We show you how to install and configure the admin-friendly authentication system.

Xrdp helps your Windows terminal clients connect to Linux.

Maybe password security isn’t perfect, but most networks depend on it. This month we examine some tools for smarter, more versatile authentication.

A one-time password won’t compromise security if it falls in the wrong hands. OPIe and OTPW bring the safety of one-time password security to Linux.

Microsoft’s Active Directory system provides centralized user management and single sign-on. If you’re ready for a few manual steps, Linux can leverage this potential.

OpenID offers an open standard for logging on to closed-door websites.

Apache offers several options for adding a password-protected area to a website.

How much power is your system really using? And how much can you actually save with the new generation of energy-conserving techniques and components? This month we study the phenomenon known as Green IT.

Save power by choosing the right system and software configuration.

Cloud computing systems like Amazon’s Elastic Compute Cloud (EC2) save power and overhead by taking the peak out of your server load.

Klaus sorts out fact and fiction in the debate on saving power with some real-world tests.