In this article, we will be looking at Network Address Translation (NAT) on the Cisco ASA. I will assume the readers of this article know what NAT and the Cisco ASA are, so I will just give an overview. In the simplest form, the Adaptive Security Appliance (ASA) is Cisco’s …

GNS3 network simulator has become part of the daily work for many network engineers around the world. It became so popular that it even surpassed other network virtualization training solutions. It all started with Dynamips  written by Christophe Fillot in 2005. The software was used for emulation of some of …

GNS3 is a routing simulator and allows you to simulate Cisco routers, switches and firewalls as well as simulate Juniper routers too. In this post we are going to download and install GNS3. To begin we need to download the software – a simple Google search takes us to http://www.gns3.net/download …

From my experience as a Network Security Engineer, I have worked on many Cisco projects involving AAA on the routers but not so many that involve AAA on the Cisco ASA. I find that a bit weird considering that the Cisco ASA is the real security device. I wonder if …

When you think of a smartphone, what brand comes to mind first?Apple? Samsung? Probably. How about a soda/soft drink? You will probably think of “Coke”. In the same way, when people think about you (in a professional point of view), what comes to their mind? This is what a Personal Branding is …

In this article, we will be discussing Open Networking and try to dissect what the “open” in Open Networking really means. We will also be looking at different real-life products and solutions that fit the Open Networking model. Finally, we will look at a practical lab example of Open Networking. …

Introduction When I started out in my Networking career, Cisco’s firewall product was called the Cisco Private Internet eXchange (PIX). A few years after that, they rebranded it as the Cisco Adaptive Security Appliance (ASA) and now Next Generation Firewall (NGFW) with FirePOWER Services. The point I’m trying to make …

Hot Standby Routing Protocol or HSRP, is a Cisco proprietary protocol that allows two or more routers to work together to represent a single IP address for a particular network. HSRP, as well as Virtual Route Redundancy Protocol (VRRP) are considered high-availability network services that allow for almost immediate fail …

Remotely triggered black hole routing is a technique that can be used to protect from DDoS attacks. It has the ability to drop undesirable traffic before it enters the protected network. This article explains how it works and how it can be configured to protect your network. What is a DDoS …

To give yourself the best chance of passing Cisco Certification Exams, all you need is: Study material Study tools Learning technique(s) Time With these four things on your side you’re putting yourself in the best position to pass the exam. Let me elaborate on each of these points and why I feel they’re so …