Understanding Linux Linux isn’t just another operating system—it’s the backbone of modern infrastructure. From web servers to firewalls and cloud platforms, Linux is everywhere. As a pentester, you’ll not only attack Linux-based systems, but also use Linux as your primary tool for offensive security work. This post will give you a solid understanding of how […]
How the Web Works – A Simple Overview from Start to Finish You’ve learned about IP addresses, DNS, HTTP, cookies, servers, routers, and more — now let’s put it all together. In this post, we’re going to walk through what actually happens when you open your browser and type in a website like offensivecyberprofessional.com It’s
Putting It All Together Read More »
How the Web Remembers You When you visit a website and it remembers who you are, keeps you logged in, or saves items in your shopping cart, it’s not magic. The browser is storing small bits of data that help the site recognize you next time. Let’s break down the three main ways the web
Cookies, Sessions, and Local Storage Read More »
DNS – The Phonebook of the Internet If you’ve ever wondered how your browser knows where to find a website when you type something like google.com, the answer is DNS. It’s one of the most important systems on the internet—but it usually works so quickly and quietly that most people don’t even notice it. Let’s
How to See the Web Like a Pentester By now, you understand how clients and servers communicate using HTTP, and how technologies like HTML, CSS, and JavaScript work together to build websites. But there’s a powerful tool already on your machine that can help you see all of this in action, right now. It’s your
The Browser and Developer Tools Read More »
The Client-Server Model (And How It All Fits Together) If you’re diving into web applications, penetration testing, or just trying to understand how websites work, you have to understand the client-server model. It’s the foundation of everything online — every login form, every website, every web app runs on this concept. Let’s break it down
Client-Server Model Read More »
Understanding Default Gateways, Routers, Switches, and Firewalls If you’re trying to learn how computer networks work, you’ve probably come across terms like default gateway, router, switch, and firewall. These are all pieces of equipment (or software) that help computers and devices talk to each other, both inside your home or workplace and out on the
Routers, Switches, and Firewalls Read More »
What Is DHCP and How Does It Work? If you’ve ever connected a device to Wi-Fi and magically gotten internet access without typing in an IP address, you’ve already used DHCP, even if you didn’t know it. DHCP stands for Dynamic Host Configuration Protocol, and it’s a core part of how networks work. As a
What Is NAT and How Does It Work? If you’re diving into networking for the first time, especially with an eye toward pentesting, you’re going to run into something called NAT, or Network Address Translation. It shows up everywhere, and it quietly plays a huge role in how devices connect to the internet. Let’s break
NAT(Network Address Translation) Read More »
Understanding IPv4: As a penetration tester, networking knowledge is a must-have. At the core of networking is IP addressing, and IPv4 is still the most widely used version today. Understanding how IPv4 works will help you navigate networks, identify misconfigurations, exploit vulnerabilities, and avoid confusion when conducting recon or lateral movement. What is IPv4? IPv4
IPv4 and Subnetting Read More »
