Fighting Against Evolving DoS/DDoS Threats –

Web Application Firewall

📌DDoS Attacks: A Cyber Zombie Apocalypse?! 🧟

Like a zombie virus in movies, a DDoS (Distributed Denial of Service) attack can instantly paralyze entire systems!

Thousands of infected PCs, acting like zombies, deliberately generate simultaneous traffic, overwhelming network bandwidth and crippling services. What starts as just a few requests quickly escalates into millions, completely taking over the server. 😱

*DoS (Denial of Service) Attack: Overwhelms a server with excessive traffic, making websites and resources unavailable.
*DDoS (Distributed Denial of Service) Attack: A type of DoS attack that utilizes multiple PCs or devices.

📌What is an L7 (Application Layer) DoS Attack?

If traditional DoS attacks are like a brute-force traffic bomb, L7 DoS attacks are like zombies pretending to be humans, cleverly bypassing Anti-DDoS solutions while draining server resources. 😲 In fact, even a single PC or a small bandwidth can cause significant damage.

L7 DoS attacks, which target the application layer (e.g., Slowloris, RUDY), consume server resources with slow, deliberate requests. As a result, existing defense mechanisms struggle to keep up. But why are these attacks becoming more powerful?

📌Why is it Difficult to Defend Against DoS/DDoS Attacks?

DoS/DDoS attacks persist because attackers have an inherent advantage. Here’s why:

• Asymmetry in attacks: Attackers can use cloud servers and botnets to generate massive traffic, while defenders must block these attacks in real-time with limited resources.

• Various attack techniques: Beyond network-layer attacks like SYN Flooding and UDP Flood, sophisticated application-layer methods like Slowloris and RUDY make defense even more challenging.

• Cost disparity between attack and defense: DoS/DDoS attacks require minimal cost but can cause massive damage, whereas defending against them requires expensive hardware and ongoing maintenance.

• Difficulty distinguishing normal traffic from attacks: L7-based attacks mimic legitimate requests, making them harder to detect and block.

Traditional network security solutions alone are not enough to defend against resource-exhaustion attacks. PIOLINK WEBFRONT-K is an advanced Web Application Firewall (WAF/WAAP) that effectively detects and mitigates L7 DoS attacks.

WEBFRONT-K’s L7 DoS Defense Features:

✅Limits maximum transmission time for session headers and bodies to block Slowloris and RUDY attacks
✅Detects and blocks abnormally slow response processing (Slow Read DoS protection)
✅ Restricts the number of requests per session or proxy to prevent HTTP Flooding
✅ Detects and blocks API-based attacks like JSON Bomb
✅ Defends against the latest threats such as HTTP/2 Rapid Reset DDoS attacks

📌DoS/DDoS Attacks: Ignoring Them Can Lead to Even Greater Damage!

DoS/DDoS attacks are not just today’s threats—they will continue to pose risks in the future. Attackers thrive on complacency, targeting organizations that fail to establish robust security measures. PIOLINK continuously researches and develops solutions to help customers effectively combat DDoS attacks.