Perform the same request against two HTTP servers and diff the results.

The Principle of Least Privilege says that software shouldn't be executed with more authority than it needs to get its job done. Unfortunately, following this principle is hard; most operating systems are configured so that the scripts and programs you run can do anything you can.

As the available supply of IPv4 addresses dwindles, the market for these virtual commodities is heating up. In recent months, the pace of the address transfers has greatly accelerated as evidenced by RIPE’s table of IPv4 transfers, as well as the increasing number of IPv4 brokers facilitating the exchange of IPv4 address space. However, the transfer of IPv4 address space isn’t always problem-free and, in this blog, we’ll review this new trend and some of the issues that can arise.

Today, at the low end of the communication protocols, we find I²C (for ‘Inter-Integrated Circuit’, protocol) and SPI (for ‘Serial Peripheral Interface’). Both protocols are well-suited for communications between integrated circuits, for slow communication with on-board peripherals. At the roots of these two popular protocols we find two major companies – Philips for I²C and Motorola for SPI – and two different histories about why, when and how the protocols were created.

Although the Readline library comes with a set of default keybindings, it is possible to modify these by putting commands into a .inputrc file, typically in the home directory. The name of this file is taken from the value of the shell variable INPUTRC. If that variable is unset, the default is ~/.inputrc If that file does not exist or cannot be read, the ultimate default is /etc/inputrc

Each of the CPUs has its own set of registers and modes. Only the memory is shared between them. That means that, in order to put the 8 cores of an i7 into long mode, we have to execute the very same procedure for each of the cores, because each core has its own register set, GDT, LDT etc. Therefore, we are able to start a CPU in real mode and keep it there, while directing another CPU to long mode

When starting a program with libremotec, you need a server somewhere (can be the same machine for testing) - it will listen on port 12345. Run server part there. Then start your own application with the right LD_PRELOAD and other configuration options.

Crackq is an online distributed GPU-accelerated password cracker designed to help penetration testers and network auditors check for weak passwords. It supports a number of hash types and we are actively adding new algorithms.

Ever wondered how device drivers are reverse engineered? We’ll show you with a simple yet complete example

This document describes a method of reading and displaying previously used framebuffers from a variety of popular graphics cards. In all 4 tested laptops the content of the VRAM was not erased upon reboot. It is also possible to show that the content of the host VRAM can be accessed from a VirtualBox guest, thereby leaking possibly confidential information from a trusted host into an untrusted guest machine.

iptables rules to do nat network

In order to measure the doppler effect for motion detection on a conventional computer, what you can do is send out a sinusoid at some known (inaudible) frequency, say, 20 kHz. If something is moving in the room, then, after the sinusoid has bounced around on the walls and into the microphone, the sound will shift in frequency. This can be measured by looking at the frequency spectrum in the nearby region of the 20 kHz tone.

A series of posts about the linux kernel.