How does Domain Name System work

What is the Domain Name System? Computers and other networking devices communicate over IP addresses. Yet, imagine having to remember the IP of each website you want to visit. Sounds…

Introduction This blog post is intended as a foundation, that will help you getting started creating bigger and more complex topologies in GNS3, using Juniper vQFX switch(es). We will put…

Peering decisions on the Internet diagram

Intro to peering decisions To make better peering decisions, we need to analyze the peering components. Peering is as simple as two networks / providers agreeing to exchange traffic. Since…

Goal of this article is to describe the process behind changing the passphrase used to generate ssh key pair (private and public) due to security policies or other scenarios where…

Bash Scripting & Conditionals After we nailed down the part with variables, let’s move on to bash scripting conditionals. Conditional statements (branching) help our script execute commands based on tests….

What is an RPM? One of the main benefits of open source software is that it lets you access each application’s core. Yet, even with that level of access, there’s…

Doing any coding without some kind of versioning control system ( VCS ) is nearly impossible today. Thanks to his creator, Linus Torvalds, we have a great distributed system that…

Are you authoritative enough?  Let’s face it – Google dominates the digital advertising space real estate, and more and more businesses are turning away from other platforms in favor of…