Kali Linux is preinstalled with over 600 penetration-testing programs, including nmap (a port scanner), Wireshark (a packet analyzer), John the Ripper (a password cracker), Aircrack-ng (a software suite for penetration-testing wireless LANs), Burp suite and OWASP ZAP (both web application security scanners). Kali Linux can run natively when installed on a computer’s hard disk, can… Read More
PostgreSQL is a powerful, open source object-relational database system. It has more than 15 years of active development and a proven architecture that has earned it a strong reputation for reliability, data integrity, and correctness. It runs on all major operating systems, including Linux, UNIX (AIX, BSD, HP-UX, SGI IRIX, Mac OS X, Solaris, Tru64),… Read More
Prosody is a modern XMPP communication server. It aims to be easy to set up and configure, and efficient with system resources. Additionally, for developers it aims to be easy to extend and give a flexible system on which to rapidly develop added functionality, or prototype new protocols. Prosody is open-source software under the permissive… Read More
If you have ever used Ubuntu Server then you should be familiar with the dynamic MOTD. This is what is presented to the user in terminal when a log on occurs. This feature is very nice as it will give you a quick look at useful information. Unfortunately, Debian Server does not include the dynamic… Read More
My original interest in this methodology came when I stumbled across Eric Mann’s article, Ludicrous Speed: WordPress Caching with Redis. Of course this led to more in-depth research which produced the solution I eventually settled on which is our modified version of Wp Redis Cache by Benjamin Adams. So, in this tutorial I will walk you… Read More
In this article I would like to share a recent experience I had upgrading a customer server to new hardware. The server being upgraded was originally deployed on desktop hardware (Dell OptiPlex GX520) as a new server for this customer was not an option. This server was built and put in place in early 2010… Read More
Sysdig to give admins and developers unprecedented visibility into the behavior of their systems. Traditionally, system-level monitoring and troubleshooting still largely involve logging into the machine with SSH and using a plethora of dated tools with very inconsistent interfaces. And since most tools don’t offer any kind of history, you’re left struggling to reproduce the… Read More
Over the past few weeks while working with client servers running Ubuntu 14.04 LTS, we noticed that the Dynamic MOTD system seems to be outdated when logging in via ssh. While this is a minor annoyance, it needed to be fixed. After a quick Google search, we came across this source which explains how to… Read More
Thin is a Ruby web server that glues together three of the best Ruby libraries in web history. 1) The Mongrel parser, the root of Mongrel speed and security. 2) The Event Machine, a network I/O library with extremely high scalability, performance and stability. 3) Rack, a minimal interface between web servers and Ruby frameworks…. Read More
I like to call the method below “The Easy Debian Server Firewall”. You may ask why I call it easy. The answer is simple, it uses standard IPTable’s and has a start and stop script to quickly disable it in the event that debugging is required. Installing the firewall is a simple two stage process…. Read More