When setting up a new Linux server, one of the first tasks for any system administrator is to configure the firewall. Usually, this involves allowing access to essential services, such as SSH (Port 22), so we can manage it remotely. The standard command for this is sudo ufw allow ssh. But there’s a silent problem […]
UFW Limit: The Smart Defense Against Brute-Force Attacks 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 »
We present an IDS Installation and Configuration Tutorial on Linux Ubuntu. AIDE is also known as a HIDS that acts very well to check the safety of your critical files. What is AIDE? AIDE (Advanced Intrian Detection Environment) is a host-based intrusion detection system (HIDS) that acts as a “digital watchman” for your critical files.
AIDE : IDS for Linux Ubuntu Installation and Configuration 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 »
In this guide, you’ll learn how to configure Snap to work behind a proxy, even if you’re new to Linux or networking. Snap is a package management system developed by Canonical that simplifies the installation, update, and removal of applications on Linux systems. However, in corporate or academic environments, internet access is often routed through
How to Use Snap Behind a Proxy on Linux (Step-by-Step Guide) Read More »
In this practical tutorial, I will show you how to create a simple switch network using the Cisco Packet Tracer simulator, one of the most commonly used tools in network teaching. If you are taking the first steps in the world of computer networks or need to review essential concepts for certification, this post is
