In the digital era where businesses rely on online systems, DDoS is a threat that can inflict severe damage. This article explains what a DDoS attack is, how it works, and why having DDoS protection is essential to safeguard your business.
What is a DDoS Attack?
A DDoS (Distributed Denial of Service) attack is a cyberattack aimed at making a server or website unavailable by sending a large number of requests or traffic from multiple sources simultaneously, preventing the system from processing legitimate requests. A DDoS attack is not a virus, although its impact—such as network outages or slowdowns—may lead some to mistakenly believe a computer is infected. This type of attack uses a controlled network of compromised devices called a botnet, consisting of hacked computers and IoT devices.
Unlike DoS, which originates from a single source, DDoS involves multiple sources attacking at once, greatly increasing attack power. Such attacks can take down websites for extended periods, severely affecting businesses and users.
How DDoS Attacks Work
- Using a Botnet: Attackers build a network of compromised machines to launch coordinated attacks from many points.
- Volume-Based Attacks: Overwhelm bandwidth by sending massive amounts of data until the system cannot accept more traffic.
- Protocol Attacks: Exploit protocol weaknesses (e.g., SYN Flood) to exhaust server resources.
- Application-Layer Attacks: Mimic normal user behavior (e.g., HTTP Flood) by sending large numbers of requests to websites or APIs, overloading the application layer.
Types of DDoS Attacks: Explained by the 7 Layers
Classified by the OSI model, DDoS attacks commonly target Layers 3, 4, 6, and 7. Each layer serves different functions, from outer to inner, as follows:
| # | Layer | Type | Primary Function | DDoS Attack Patterns |
| 7 | Application Layer | Data | Manages application processes on the network | HTTP Flood, DNS Query Flood (sending HTTP or DNS requests to overload servers) |
| 6 | Presentation Layer | Data | Data presentation and encryption | SSL Abuse (misusing SSL/TLS to overload servers) |
| 5 | Session Layer | Data | Communication between hosts | No direct attack pattern commonly cited |
| 4 | Transport Layer | Segment | End-to-end connections and reliability | SYN Flood (repeated TCP connection requests to exhaust server resources) |
| 3 | Network Layer | Packet | Routing and logical addressing | UDP Reflection Attack (sending UDP requests to reflectors to amplify traffic toward the target) |
| 2 | Data Link Layer | Frame | Physical addressing of devices | No direct attack pattern commonly cited |
| 1 | Physical Layer | Bit | Medium, signaling, and binary transmission | No direct attack pattern commonly cited |
How to Prevent DDoS Attacks
There are multiple strategies to bolster defenses and respond effectively:
-
Network Monitoring and Surveillance
Use tools to analyze network traffic, define baselines for normal behavior, and trigger alerts upon anomalies.
-
Using DDoS Protection Services
Adopt services from providers with dedicated DDoS mitigation (e.g., GWS CLOUD). These systems can effectively filter and block malicious traffic.
-
Increasing Network Resilience
Distribute servers across multiple locations to avoid single points of failure and increase network bandwidth to absorb traffic spikes.
-
Creating a Response Plan (Response Plan)
Prepare incident response steps for suspected attacks and designate a skilled team to act quickly.
-
Training and Preparing Your Team
Educate staff on DDoS response procedures and conduct drills so your team can act efficiently under pressure.
The Importance of DDoS Protection
-
Maintain Service Continuity
DDoS protection prevents outages that hurt brand reputation and user trust.
-
Reduce Financial Damage
Downtime can directly reduce revenue—especially for online-first businesses—so protection is essential.
-
Protect Sensitive Data
DDoS can be a smokescreen for data theft; without strong defenses, customer and organizational data may be at risk.
-
Ensure Regulatory Compliance
Avoid violations of data-protection requirements and reduce legal exposure if critical data is damaged or leaked.
Understanding what DDoS is and preparing defenses will keep your business running smoothly amid the rising tide of cyber threats.
Fortify Your Business with DDoS Protection from GWS CLOUD
With 25+ years operating data centers and implementing cloud systems—recognized by the Taiwan government and trusted as a supplier for 6 consecutive years, and in partnership with leading cybersecurity firms—GWS CLOUD delivers robust protection.
GWS CLOUD’s DDoS protection auto-detects, responds in real time, and mitigates all types of DDoS attacks. Backed by 300+ global scrubbing points and 200+ Tbps of capacity, it filters malicious traffic at the edge and shields your network in real time for maximum stability.
Highlights of GWS DDoS
- Flexible, adaptable mitigation strategies
- Global scrubbing network with cloud-based monitoring centers
- 24/7 cloud monitoring and technical support
- Multi-layered protection solutions
- Monthly subscription options to reduce organizational costs and overhead
Contact GWS CLOUD
- Phone: +66 2 016 6586
- LINE: @gwscloud
- Email: support@gwscloud.com
- Facebook: https://www.facebook.com/GWSCLOUD
