If you are a Windows systems administrator or manage a company’s IT infrastructure, stop what you are doing and read this. Microsoft has just issued a security alert of the highest severity, requiring an “out-of-band” update (outside the normal cycle) for Windows Server Update Services (WSUS). The reason? A critical security flaw, tracked as CVE-2025-59287,
Do you need your virtual machines (VMs) in VirtualBox to communicate with each other, but also access the internet? And, at the same time, want to keep them isolated from your main physical network (your Wi-Fi or wired network)? The “NAT Network” mode is the ideal solution for this scenario. Unlike the standard “NAT” mode
Configure VirtualBox NAT Network: VM Communication and Internet Access Guide Read More »
Today, we’re going to dive into an attack tactic that, despite its simplicity and reliance on social engineering, has proven incredibly effective at bypassing defenses and achieving remote code execution (RCE): ClickFix. Popularized by researchers like John Hammond and documented in the ClickGrab project, ClickFix is a stark reminder that “layer 8” (the user) remains
The ClickFix Attack: How “Copy & Paste” Leads to Remote Code Execution (RCE) Read More »
Your internet is down… again. Was it the provider? Did the router crash? Or did someone trip over the cable? For those who work from home, play online, or simply can’t live without a connection, this uncertainty is frustrating. What if you could have a “digital watchman” that would notify you the exact moment your
Monitor Your Router with Zabbix: The Definitive ICMP Ping Guide Read More »
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 »
