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Fetching network statistics (Python and Linux)

A little bit of code that loads network device statistics from any operating system that supports procfs.

Just a small snippet. Originally used in some network monitoring code that I wrote that graphed your network traffic.

I would include that here too but that's a little messy.

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Bash Script: Start irssi (or any process) if not already running via a cronjob

I know there are a thousand of these available online. This is one I just wrote and wanted to make it a thousand and one. This script will start irssi if there is no irssi process available.

Save the following script somewhere (example /home/kay/bin/irssi_init.sh) and add the following to your crontab:

*/1 * * * * /home/kay/bin/irssi_init.sh >> ~/irssi_init.log

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Performing a Denial of Service (DoS) Attack on a Phone Line

Intro

Denial of Service attacks are nothing new to people in the IT and computer security world. DoS attacks are a very simplistic form of attack which aim to flood the target (whether it be a computer, mobile device, or phone line) with traffic so that it cannot process legitimate traffic. While being simple simple to perform, DoS attacks are often difficult to defend against without significant downtime.

Today I'm going to show you how to perform a DoS attack on a phone line. This process is simple, quick to perform, and very illegal. Before we get started, I'd just like to remind you that this article is for educational purposes only! All the code I'm putting into this article is python, and should work on any system with python 2.4+.

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Setting up synergy auto-start securely

Synergy is a popular application for sharing a keyboard and mouse between multiple computers on multiple operating systems using your network. One of it's biggest flaws is that the underlying protocol is unencrypted. This means that people could potentially read what you type remotely. This article describes a method for setting up an encryption layer for Unix-like and Windows machines as well as automatically starting Synergy on system boot-up without user-prompts.

While I have no doubt there are several articles on this subject elsewhere, I'm going to give you a walk through from my point of view about how you can set up synergy across multiple Windows and Unix-like systems securely.

This walk through will be divided into two parts. First will be Unix-like setup and the second part will be Windows setup.

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Installing the link layer topology discovery (LLTD) protocol responder on Debian Linux

This post on how to install the LLTD is largely ripped off from http://www.howtoforge.com/installing-the-lltd-protocol-responder-for-linux-on-debian-lenny and made a bit more direct for those that just want to make it work and not pay attention to what you're doing! Like me!

So let's dive right in.

mkdir lltd
cd lltd
wget http://download.microsoft.com/download/b/8/e/b8eee444-f8d5-4b8b-aa3d-2f19bf19ac72/Rally-LLTD-PortingKit.exe
unzip Rally-LLTD-PortingKit.exe
sudo apt-get install linux-headers-`uname -r` build-essential

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Installing Programs on Linux Without root

Prefixed Portage

Most Linux distributions have great package managers like apt or portage. But installing programs when you don't have root access can be a pain. You need to find, download and install all the dependencies and their dependencies, setup a prefix somewhere in your home folder and hope that everything works.

Prefixed portage is perfect for those kinds of situations. It's a modified version of portage, the package manager of the Gentoo distribution. I am using it on a computer running Linux, but you can also use it on OS X, FreeBSD and Solaris to install applications and libraries from the portage repository.

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