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Remote access using NX and OpenSuse 11.1

Friday, 16 January 2009
NoMachine NX is a solution for secure remote access, desktop virtualization, and hosted desktop deployment using compression, session resilience and resource management. It integrations a powerful audio, printing and resource sharing capabilities and makes it possible to run any graphical application (e.g KDE, Gnome etc.) across the network connection. The NX Free Edition is easy to install and works on almost all Linux distributions. The following workshop describes the installation and the first run on an OpenSuse 11.1 server.
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Trick: Enable high-speed USB 2.0 support in your VM

Tuesday, 13 January 2009
If you have created your VM image using an earlier version of VMware Workstation or Server, you possibly see the following error messages or advice: “"Please upgrade your virtual machine to enable high-speed USB 2.0 support for the device "Removable Disk". An attempt will be made to connect this device to the best available host controller. This may result in an undefined behavior for this device"
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Choosing a Secure Password - The Linux-Tip Approach

Sunday, 04 January 2009
Here is my question: Are “cyEma7;IkmH!” or “hot1BA-Bitso69” secure passwords? Yes definitely, but who (the hell) can remember it! YOU WILL - after reading this article! Your passwords play a crucial role in protecting your computing accounts and the personal information that can be accessed through them. One of the problems with passwords is that users forget them. For that reason people use simple password phrases like their dog’s name, their kid’s first name and birthdates, the name of the current month or everything in different combinations.
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Open Vulnerability Assessment System

Friday, 19 December 2008
OpenVAS stands for Open Vulnerability Assessment System and is a complete tool for network security scanning including a graphical user front-end. I is used to detect security problems in remote systems and applications. The OpenVAS development team consists of various interested parties from academia and commercial entities as well as individuals. OpenVAS derives from the Nessus project which turned into a commercial product. All OpenVAS products are Free Software under the GNU General Public License (GNU GPL).
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Forensic investigation using free Linux tools

Saturday, 06 December 2008
Here is a scenario you can think about. An administrator of a company has been accused of hoarding illegal material of questionable moral content on his company network system. You have been called upon to examine the suspect server and unearth evidence related to the said illegal material. Your boss has told you that you are not allowed to shutdown the server. Unfortunately no additional money is available to buy forensic tools or equipment. In this workshop we will explain, how to use free forensic tools to investigate such cases.
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Set up a SSH-based point to point connection

Sunday, 30 November 2008
OpenSSH version 4.3 introduced a new feature: the ability to create on-the-fly "Virtual Private Networks" via the tunnel driver (the so-called "tun" driver). This allows you to create a network interface that bridges two physically disparate network segments in different locations. This article explains how to use SSH to set up SSH-based point to point connections with OpenSuse 11.0 which can then be used to create routes that create virtual private networks.
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Trick: Speed up your Internet access using Squid's refresh patterns

Friday, 21 November 2008

Bandwidth limitation is still a problem for a lot of people who connect to the Internet. You can improve your available bandwidth by installing Squid caching proxy server on your network with configuration parameters that will increase your byte hit rate, giving you about 30-60% more bandwidth.

Using commercial tools in Backtrack 3

Sunday, 02 November 2008
In a previous article Linux-Tip explained how to install the current release (Backtrack 3 Final) in a virtual environment using VMWare. The goal was to run Backtrack 3 from the hard disk connected to a Wireless USB Adapter and to use the tool Kismet. It further explains how to collect valid wireless networks and to display them on Google Earth’s worldwide map system. In this article we’ll show how to add Nessus and to use the already integrated SAINT vulnerability scanner and Maltego. We’ll update Fast-Track and will show how to use the web-based interface.
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Tip: Preventing MySQL Injection Attacks With GreenSQL

Sunday, 02 November 2008
GreenSQL (or greensql-fw) is a firewall for MySQL databases that filters SQL injection attacks. It works as a reverse proxy, i.e., it takes the SQL queries, checks them, passes them on to the MySQL database and delivers back the result from the MySQL database. It comes with a web interface (called greensql-console) so that you can manage GreenSQL through a web browser. This guide shows how you can install GreenSQL and its web interface on a Debian Etch server. I do not issue any guarantee that this will work for you!
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