Practical guide on how to configure NAT Overload (PAT) in Cisco Packet Tracer. See the network topology, essential router commands, and copy a complete script for your networking lab.
How to Configure NAT in Packet Tracer (Step-by-Step) Read More »
Learn step-by-step how to configure DHCP in Cisco Packet Tracer. See how to distribute IP addresses, masks, and gateways automatically using a dedicated server or a Cisco router.
Configure DHCP in Packet Tracer: Server & Router Guide Read More »
Let’s talk about one of the most primitive and, at the same time, most robust routing techniques: Flooding. Imagine you need to spread urgent gossip. You don’t choose a specific person; you shout to everyone nearby, and those people shout to the next ones, and so on. That is Flooding. 1. How does it work
Flooding Routing Algorithm: How It Works & Use Cases Read More »
If you have ever used a GPS to avoid traffic, you already intuitively understand the fundamental problem of computer networks. When you send a message, it needs to traverse a “web” of routers to reach its destination. But how do these devices decide where to go? Do they choose the path with the fewest cables?
Routing & Dijkstra’s Algorithm: Finding the Internet’s Shortest Path Read More »
Keeping a server secure is an ongoing task, and one of the biggest threats is malicious software that hides in the system to grant an attacker persistent access. The most dangerous among them are rootkits. In this tutorial, we will introduce an essential, top-tier tool for any system administrator: the chkrootkit. It is a lightweight
How to Scan for Rootkits and Malware on Linux Servers with chkrootkit Read More »
If you have ever worked with networks in Linux environments, you certainly know and love netcat (or nc), the famous “Swiss Army knife” for network diagnostics. But when migrating to Windows, many system administrators and security analysts wonder: is there a native and equally powerful equivalent? The answer is a big yes! In modern Windows,
Netcat for Windows: The Ultimate Guide to Test-NetConnection in PowerShell Read More »
In this tutorial, we will teach you how to install and configure the NGINX web server on a machine with the Linux operating system. We will do a quick installation followed by the main commands so you can start operations on the NGINX server. Installing NGINX on Linux To install NGINX, we will start by
How to install and configure NGINX on Linux Read More »
In this tutorial, we will teach you how to install OPNsense on VirtualBox in a simple and efficient way. OPNsense is an incredible tool for those looking for a secure operating system with various tools to provide security. Downloading OPNsense Now, let’s download OPNsense using the link below. https://opnsense.org/download/ Next, we will select the architecture
Tutorial: How to Install OPNsense on VirtualBox Read More »
This technical post breaks down congestion control mechanisms, focusing on the role of the transport layer. When multiple devices attempt to send an excessive volume of data simultaneously, the network can become overwhelmed. This phenomenon, known as congestion, leads to performance degradation, causing packets to be delayed or even lost. What Is Congestion Control and
Congestion Control in Networks: Optimizing Efficiency and Bandwidth Allocation Read More »
In this tutorial, we will show you how to configure a network with just one router in Packettracer. It will be a very simple and objective tutorial. The tutorial will also show some important points such as the use of the default gateway and tests with ping and tracert. In addition, we will show you
Packet Tracer network with one router Read More »
