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Hillstone Networks

The New Era of Cybersecurity: The Evolution of Web Application Firewalls (WAF)


The Importance of Having a Firewall and Data Protection

Having a firewall is the foundation of every cybersecurity strategy. A firewall acts as the first line of defense against unauthorized access, filtering network traffic, and blocking dangerous connections. This protects personal data, confidential company information, and important resources from cyber attacks.


What is WAF?

A Web Application Firewall (WAF) is a specialized type of firewall that protects web applications by monitoring and filtering HTTP traffic between the application and the Internet. WAFs focus on specific threats to web applications, such as cross-site scripting (XSS) attacks, SQL injections, and Cross-Site Request Forgery (CSRF). WAFs provide a layer of protection by analyzing application traffic and blocking potentially harmful queries before they reach the application server.


WAF and MPLS Traffic Inspection: High-Level Protection

Multiprotocol Label Switching (MPLS), the backbone of data transfer in corporate networks, has seen WAFs evolve not just to observe but to actively protect MPLS traffic. Modern WAFs analyze traffic in real-time, providing effective protection against threats before they reach the network's core.


Innovations in File Transfer: Intelligent Analysis and Protection

File transfer is still vulnerable to attacks, but new generations of WAFs bring innovations. Advanced algorithms have been introduced that analyze not just file extensions, but also file content, enabling the detection of hidden threats. These tools learn and adapt, providing increasingly better protection.


Countering Reverse Shell and SSRF Attacks: Advanced Detection

Reverse shell and SSRF (Server-Side Request Forgery) attacks pose serious threats. New WAFs have enhanced detection mechanisms that use artificial intelligence to identify and block these attacks. Through continuous learning and pattern analysis, WAFs are becoming more sophisticated in countering these complex threats.


WAF V3.4: A Breakthrough in Performance and Functionality

The latest version of WAF, V3.4, introduces significant improvements. It includes a POC testing tool that facilitates the checking of potential vulnerabilities and a tool for verifying the integrity of HTTPS certificate chain configurations. Additionally, software-level optimizations significantly increase system performance.



WAFs are evolving, becoming an increasingly essential element in cybersecurity. They provide effective protection not only against known threats but also against new, more sophisticated attacks. As technology develops, WAFs become a key element in defending our digital worlds.

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