Someone recently asked me a question: How can I save time and script size by specifying a range of IP addresses or ports using iptables? In old version of iptables IP address ranges are only valid in the nat table (see below for example). However newer version does support option that allows you to specify a range of IP addresses or ports for regular tables such as input. You need to use fol... Read more.

I got a chance to play with Squid and iptables. My job was simple : Setup Squid proxy as a transparent server. Main benefit of setting transparent proxy is you do not have to setup up individual browsers to work with proxies. System: HP dual Xeon CPU system with 8 GB RAM (good for squid). Eth0: IP:192.168.1.1 Eth1: IP: 192.168.2.1 (192.168.2.0/24 network (around 150 windows XP systems)) ... Read more.

Normally Linux systems can only read from Windows NTFS partitions, but not write to them which can be very annoying if you have to work with Linux and Windows systems. This is where ntfs-3g comes into play. ntfs-3g is an open source, freely available NTFS driver for Linux with read and write support. This tutorial shows how to use ntfs-3g on a Fedora 7 desktop to read from and write to Windows NTF... Read more.

This tutorial will guide you through installation and configuration of Lintrack, a GNU/Linux distribution specialized in networking tasks. We will give two LANs access to the internet along with DHCP and DNS cache servers, and then we will connect our networks using OpenVPN in bridging mode. You should be running all these in well under an hour, thanks to the unified configuration interface of Lin... Read more.

The Linux Foundation yesterday announced that Nokia Siemens Networks has become a member. Nokia Siemens Networks will work with the foundation and its members to continue improving Carrier Grade Linux (CGL). Nokia Siemens Networks, a leading enabler of communications services, will be working with the foundation specifically on Linux-based technologies for use in User Plane and Control Plane Ne... Read more.

To mark the second birthday of the openSUSE project, the community program last week celebrated with two announcements – the availability of the first beta of openSUSE 10.3 and the growth of the openSUSE Build Service with a new end-user interface. The openSUSE Build Service is a framework that provides an infrastructure for software developers to create and compile packages for multiple Linu... Read more.

Lenovo will offer a version of Linux on its ThinkPad notebooks beginning in the fourth quarter, the company announced Monday. The Chinese PC maker has selected Suse Linux Enterprise Desktop 10 from Novell as its first supported entry into the world of open source. Though ThinkPads have been certified to run Linux in the past, this is the first time Lenovo will support the hardware and operating... Read more.

This year's Black Hat was pretty much summed up in a prescient keynote by Richard Clarke, the nation's former cyber security czar now novelist and chairman of Good Harbor Consulting. Clarke said "we're building more and more of our economy on cyberspace 1.0, yet we have secured very little of cyberspace 1.0." The apparent speed gained in Ajax (Asynchronous JavaScript and XML), which is technology ... Read more.

The are a couple of things that are essential to any hacker’s walk of life. To name a few, there’s the ubiquitous flash drive for data transfer. You have the crossover cable for even faster data transfer. There’s the WiFi antenna for high gain and strong amplification.   Possibly, you might find a video capture card in the computer. Of course, there’s the ubiquitous laptop and de... Read more.

Fedora 7 was released last week, a little bit behind schedule, with a spate of new features, updates, and live CD installable "spins" of Fedora in KDE and GNOME flavors. I found a lot of good in this release, but a bug in the FireWire stack that attacked my external backup drive made this release just a little shy of perfect. Fedora 7 offers several ISO images for installation -- a live CD with... Read more.