Vaishnavi
What are the different types of firewalls and how do they work in network security?
Firewalls are essential cybersecurity tools that act as barriers between trusted and untrusted networks. There are several types of firewalls, each with unique functionalities, from packet filtering to deep packet ins...
What are the top cybersecurity tools used by professionals in 2026?
Cybersecurity professionals in 2026 rely on many specialized tools to detect threats, secure networks, and investigate breaches. From password cracking and web application testing to forensics and threat intelligence,...
What is the new QR code phishing attack in PDFs, and how can I protect myself from it?
A new advanced phishing technique called “Scanception” is using malicious QR codes embedded in professional-looking PDF files to bypass security filters and steal credentials. These PDF attachments appear legitimate, ...
OCSP Stapling in NGINX: Configuration, Testing and Troubleshooting
OCSP stapling is a modern TLS optimization technique that boosts SSL certificate validation performance and security. When configured properly in NGINX, it allows your server to provide clients with proof of certifica...
How to Check Which Process Is Using a Specific Port on Your System
Identifying which process is using a particular port is important for troubleshooting network issues, freeing up occupied ports, and ensuring system security. This can be achieved using built-in tools like lsof, netst...
What is the future of cybersecurity in a cloud-first world?
As organizations increasingly shift to cloud-first strategies, traditional security models are becoming obsolete. The future of cybersecurity in this environment emphasizes zero trust architecture, identity and access...
What are the top 15 vulnerability scanning tools used in cybersecurity today?
Vulnerability scanning tools identify security weaknesses in systems, networks, and applications before malicious actors can exploit them. In 2026, cybersecurity professionals rely on many scanners, both open-source a...
Common Network Protocols: What Each Does, Its Port, and How They Work Together
Network protocols are standardized rules that define how data is transmitted and received across devices in a computer network. This blog explains key protocols like HTTP, TCP/IP, FTP, DNS, and more, with a detailed t...
How does a computer network work and what are the key components that enable network communication?
A computer network functions by interconnecting multiple computing devices using hardware and software to enable data exchange and resource sharing. These networks operate based on well-defined protocols like TCP/IP, ...
What is the Fortinet FortiWeb CVE-2025-25257 vulnerability and how is it being exploited?
The CVE-2025-25257 vulnerability is a critical SQL injection flaw found in Fortinet’s FortiWeb web application firewall. Actively exploited in real-world attacks, it allows unauthenticated attackers to send crafted HT...
What are the essential tools and steps for Linux network configuration and how can system administrators manage connections using Netplan, networkd...
This blog provides a detailed overview of how Linux handles network configuration, the role of essential components like Netplan, networkd, and NetworkManager, and where configuration files are located. Understanding ...
What is a Linux cheat sheet and how can it help in system administration?
A Linux cheat sheet is a quick reference guide that lists essential commands and syntax for using and managing Linux systems efficiently. These sheets condense many command-line instructions into an accessible format,...
What are the most useful Linux system administration commands and how do they work?
Linux system administration relies heavily on command-line tools that help monitor, manage, and troubleshoot servers. This guide offers an overview of the most commonly used Linux commands for system admins, covering ...
What is Lynis in Linux and How to Use It for Security Auditing and System Hardening?
Lynis is an open-source security auditing tool designed for Linux, macOS, and other UNIX-based systems. It helps system administrators and cybersecurity professionals assess their system's security posture by performi...
What Are the Most Reliable Ways to Check if a Directory or File Exists in Linux Using Shell Scripts?
In Linux, ensuring the existence and type of a file or directory is a critical part of shell scripting, especially when automating system tasks or hardening configurations. This blog explains how to check if a file or...
What are the most important Linux server hardening steps to secure systems in 2026?
Linux server hardening is important today, as attacks increasingly target misconfigured or poorly secured systems. Hardening a Linux server involves configuring the system to reduce vulnerabilities, limit attack surfa...