If you have decided to enable a SSL ( Secure Sockets Layer ) protocol on your web server it may be because you would like to extend its functionality to achieve an integrity and confidentiality for a data transferred on unsecured networks. However, this protocol with the combination of PKI ( Public Key Infrastructure ) principles can also along the side of integrity and confidentiality provide authentication between both sides involved in the client-server communication. One-way SSL authentication allows a SSL client to confirm an identity of SSL server. However, SSL server cannot confirm an identity of SSL client. This kind of SSL authentication is used by HTTPS protocol and many public servers around the world this way provides services such as webmail or Internet banking. The SSL client authentication is done on a “application layer” of OSI model by the client entering an authentication credentials such as username and password or by using a grid card. Two-way SSL authentication also known as mutual SSL authentication allows SSL client to confirm an identity of SSL server and SSL server can also confirm an identity of the SSL client. This type of authentication is called client authentication because SSL client shows its identity to SSL server with a use of the client certificate. Client authentication with a certificate can add yet another layer of security or even completely replace authentication method such us user name and password. In this document, we will discuss configuration of both types of SSL authentication one-way SSL authentication and two-way SSL authentication.

Knoppix can be used to back up files easily from hard drives with inaccessible operating systems. To quickly and more safely use Linux software the Live CD can be used instead of installing another OS.

Linux is a hacker’s dream computer operating system. It supports tons of tools and utilities for cracking passwords, scanning network vulnerabilities, and detecting possible intrusions. I have here a collection of 10 of the best hacking and security software tools for Linux. Please always keep in mind that these tools are not meant to harm, but to protect.

The SCP protocol, which runs on port 22, is similar to the BSD rcp protocol, however unlike rcp, data is encrypted during transfer, to avoid potential packet sniffers extracting usable information from the data packets. The protocol itself does not provide authentication and security; it relies on the underlying protocol, SSH, to provide these features. 

We will show you some of the useful productivity enhancements that Compiz has to offer, such as multiple desktops (workspaces), moving windows between desktops, expo (preview and choose from all your desktops), resizeable window previews, and scale (display and choose from all your open windows at once).

Slackware doesn't try to pre-empt you – it doesn't attempt to guess what you want to do and what you're using the installation for. You might be running it as a server or router, in which case the default boot-up mode (to a text login) is perfect. Chances are you'll want to use it in graphical mode, though, so follow these instructions to get it working to your liking.

Your step by step guide to installing Slackware 12.2 Slackware requires at least a 486 CPU and 48MB of RAM, so it's useful for reviving dusty old machines, but if you want to use a modern desktop we recommend a 1GHz CPU and 256MB RAM. You can obtain the distro on CD or DVD from www.slackware.com.

Slackware is a curious animal, minding its own business while other distros roam the popularity plain and strive for dominance among their peers. It's not trying to win enormous desktop market share, nor is it loaded with blinking lights, hold-your-hand graphical wizards and package managers that change with every release. Slackware is about as pure a GNU/Linux system as you can get – at least, without all the arduous leg work of Linux From Scratch. There are many reasons why Slackware has a devoted base of hardcore fans, usually Linux old-timers but occasionally newcomers too. The top four: It's almost entirely developed by one man. The packages are not patched to the hilt. It's comfortable in its own distrosphere. It's very, very, very stable.

With the different audio and video formats available, there is often the need to inter convert amongst them - sometimes for quality and sometimes for compatibility. Here are some of the better software, that you can use to achieve the inter conversions on your Linux box.

VirtualBox, the popular, amazing, open-source, virtualization software from Sun Microsystems, reached version 3.0.0 a few minutes ago. This major update brings lots of new features, many bugfixes and improvements over previous 2.x versions. The big and breathtaking news is that users can now use Direct3D 8 and 9 games or applications! Moreover, with VirtualBox 3.0.0, support for OpenGL 2.0 (only for Linux, Solaris and Windows guests) has been implemented. Another important feature is the new SMP (Symmetrical Multiprocessing) guest support with no more than 32 virtual processors.