Finance

• 15.11.2025

Firewall: What is it and why does it remain the cornerstone of today's network security?

🏁 Article Introduction In a world where cyberattacks are increasing by the day, many CTOs and business owners wonder: Is the firewall we use today really enough to protect our data? Or do we need newer, smarter solutions to keep up with the new threats that appear every week? If you're looking for a clear answer, this comprehensive guide is what you need.In this article, you'll learn all about the firewall - from its basic concept and how it works across network layers, to its different types such as Stateless, Static, NGFW, and WAF, and best practices for choosing it and running it without loopholes. Whether you're a CISO, network engineer, or entrepreneur looking to build a secure environment for your startup, here you'll find a practical, step-by-step plan for designing and implementing an effective, integrated firewall. You'll not only learn how to prevent attacks, but how to create a dynamic security ecosystem that evolves with risk. 🧱 Firewall: What is it and why is it the cornerstone of today's network security? Firewall - A quick definition and its role as the first line of defense against threats A firewall is one of the cornerstones of modern cybersecurity systems, acting as a gatekeeper between secure internal networks and the untrusted outside world. It monitors incoming and outgoing traffic and applies predefined security policies to determine what is allowed and what is not.