Knowledge Base List

When a well-known cross-border e-commerce platform encountered a 2.3Tbps hybrid DDoS attack on Black Friday 2023, its business system still maintained 100% availability. Behind this miracle is the support of high-defence CDN (Content Delivery Network with DDoS Protection) technology architecture. As a fusion product of network security and content acceleration, high-defence CDN is reconstructing the defence paradigm of Internet infrastructure. According to Gartner's prediction, by 2025, 70% enterprises worldwide will adopt high-defence CDN as their core network security solution.

First, the technical nature of high-defence CDN: quantum entanglement of defence and acceleration

1.1 The Evolutionary Dilemma of Traditional CDNs

Traditional content delivery networks (CDNs) mainly address network latency and bandwidth pressure, but there are three major flaws in their security protection:

• single-point protection: Lack of independent defence capability of edge nodes

• protocol blind spot: Unable to identify attack loads in HTTPS traffic

• lag in response: Attack traffic needs to be sourced back to the cleansing centre for processing

1.2 Architectural Revolution of High Defence CDNs

High-defence CDN realises the deep coupling of security and acceleration through the Distributed Security as a Service (DSaaS) architecture:

1. Intelligent Traffic Scheduling Layer

   • Anycast Routing Decisions Based on Real-Time Threat Intelligence

   • Attack traffic is automatically directed to the nearest cleaning node

   • Dynamic election mechanism for healthy nodes

2. Edge Security Computing Layer

   • Integrated T-level DDoS cleaning capability per CDN node

   • Hardware-accelerated TLS/SSL decryption chips (e.g. Intel QAT)

   • Embedded Web Application Firewall (eWAF)

3. AI Security Brain

   • Global Attack Feature Library Trained Using Federated Learning

   • Adaptive threshold adjustment algorithm based on flow baseline

   • Zero-day attack prediction model (92.7% accuracy)

II. Three-dimensional breakthroughs in defence effectiveness

2.1 The Capacity Dimension: Distributed Resolution of Terabyte-Scale Attacks

• Horizontal extension of defence: Sharing of attack traffic through 3000+ nodes globally, single node load dropped by 99%

• Protocol stack offloading: Reduced CPU consumption by 75% by completing SYN Cookie authentication at the edge node

• Elastic bandwidth pool: Burst defence capability of up to 15 Tbps (equivalent to 300 simultaneous 50 Gbps attacks)

2.2 The precision dimension: microsurgery with application layer attacks

• HTTPS Deep Inspection: Identify malicious requests without interrupting the encrypted channel

• API Fingerprint Library: Attack interception rate for new interfaces such as GraphQL, gRPC, etc. exceeds 99%

• Man-machine validation matrix: Distinguish between real users through senseless authentication codes, device fingerprint recognition

2.3 Speed dimension: closed loop defence with microsecond response

• Edge Rule Engine: Security policies are enforced locally on the node with a delay of <3ms

• BGP black hole routing: Attacking IPs are quarantined across the network within 45 seconds

• Automated Attack and Defence Scripts: <500ms from attack identification to policy enforcement

III. Industry Solutions Panorama

3.1 The financial sector: "body armour" for trading systems

Implemented by a stock exchange after deploying a high defence CDN:

• 99.999% Availability for Securities Trading APIs

• Millisecond blocking of high-frequency transaction fraud

• Compliance Audit Log Meets SEC Regulation SCI Requirements

3.2 The gaming industry: "safe lanes" for global co-servicing

A MOBA game passes through a high defence CDN architecture:

• Mainland China players directly connect to Hong Kong nodes (latency <30ms)

• European and American players accessing Frankfurt node (defence against 200Gbps UDP flooding attack)

• Deep integration of real-time anti-plug-in system and CDN logs

3.3 The streaming industry: the "fuse" for 4K live streaming

Technical specifications of a UHD live streaming platform:

• CC Attack Recognition Accuracy of 99.3% in 8K Video Streaming Transmission

• Protect against 5 million API attacks per second with edge node caching

• Intelligent Linkage of Dynamic Code Rate Adjustment and Security Policy

IV. Interpretation of core technical indicators

4.1 The Golden Triangle of Defence Performance

4.2 The Iron Triangle of Acceleration Performance

V. Decision tree for technology selection

5.1 Assessment of the match of business characteristics

• flow rate model: Sudden (live) vs. Steady-state (official)

• Protocol type: HTTP/3 vs WebSocket

• compliance requirement: GDPR vs. Cybersecurity Law

5.2 Supplier capability matrix

1. Nodal coverage density: Financial-grade services need to meet the requirement of having an edge node within a 50km radius.

2. Cleaning Centre Layout: Required to be within the ITU-T G.8273 standard delay circle

3. API Ecological Integrity: support for interfacing with Cloudflare Workers, AWS Lambda@Edge

5.3 Cost optimisation models

• Defence cost formula::
  Total Cost = (Base Bandwidth Fee × 95% Cache Rate) + (Attack Traffic × Dynamic Pricing Factor)

• typical case: An e-commerce company saves 461 TP3T in security expenses through smart scheduling

VI. Future directions of technological evolution

6.1 Security Evolution for Edge AI

• Adversarial machine learning: Game training for defence AIs and attack AIs

• neural cleansing network: Identifying Distributed Attack Features Using GNNs

• digital twin attack and defence: Previewing attack scenarios in virtual mirrors

6.2 Quantum Secure CDN

• post-quantum cryptography: Integration of CRYSTALS-Kyber in NIST standardised algorithms

• quantum key distribution: Constructing a QKD relay network through CDN nodes

• Photonic CDN Architecture: Zero-delay defence using quantum entangled states

6.3 Metaverse Security Stack

• XR Content Protection: Asset Encryption for Unity/Unreal Engine

• Spatial computational validation: Preventing virtual space DDoS from causing motion sickness

• digital human identity chain: Blockchain-based behavioural auditing for Avatar

VII. Implementation road map and risk management

7.1 Four-phase deployment framework

1. Attack surface mapping: Identify exposed assets through the ASM (Attack Surface Management) platform

2. Strategic Sandbox Testing: Validating 200+ Attack Vector Defence Effectiveness in a Simulation Environment

3. Grey scale traffic switching: Progressive migration in the ratio 5%-20%-50%-100%

4. Continuous threat monitoring: Establish core KPIs such as MAE (mean intercept efficiency)

7.2 Legal Compliance Boundary

• data sovereignty: Avoiding EU user data passing through nodes not certified for GDPR

• cross-border transmission: Adoption of TISAX or PRIME-PP international encryption standards

concluding remarks

The essence of high-defence CDN is to transform the security capability from a centralised fortress to a distributed immune system. Under the wave of Web3.0 and meta-universe, the architecture of "everywhere is a defence line, node is a fortress" is redefining the battlefield rules of network attack and defence. When the 5G network delay enters the millisecond era, the only way to build a real dynamic moat for digital business is to compete with attackers for speed with high-defence CDN. In the future, with the deep integration of edge computing and AI security, high security CDN will evolve into an autonomous nervous system of the intelligent network, realising the qualitative leap from "threat response" to "risk prediction".

Dedicated server for DDoS protection

Our Dedicated Servers for DDoS Protection are physically separate servers that are connected exclusively to the secure DDoS-Guard infrastructure. These dedicated servers are physically separated from other users' servers, providing the safest, most controlled environment for your websites and applications. You'll gain full control over your servers, with the flexibility to configure all parameters, including features, hardware models and security settings, to ensure that specific business needs are met.

Integrated DDoS protection with CDN

Our protected Virtual Private Servers (VDS) are connected through the DDoS-Guard infrastructure, which provides robust protection against DDoS attacks at the network (L3-L4) and application (L7 OSI) layers.DDoS-Guard utilises a network of geographically-distributed traffic-filtering nodes, which act as a reverse proxy server for the VDS, effectively protecting your data traffic.

In a real-world scenario, when traffic from Japan pours in, the system intelligently directs it to a filtering node in Hong Kong. This node identifies and filters out offensive IP packets and malicious HTTPS requests, while ensuring that legitimate traffic is quickly delivered to your protected servers. If the Hong Kong filtering node becomes overloaded, our intelligent traffic tunneling technology avoids delays by forwarding traffic from all major nodes simultaneously, providing a seamless user experience.

By filtering traffic in the source region, we not only reduce the load on the backbone operator, but also significantly speed up the response time of your website. In addition, these dedicated servers operate in a similar way to a Content Delivery Network (CDN), which not only caches website content, but also effectively reduces user load times and improves the visitor experience.

We use only in-house developed software for traffic filtering. This proprietary solution ensures high service availability (SLA) while eliminating the security risks that can arise from third-party software vulnerabilities. With this range of state-of-the-art technology and protection mechanisms, you can rest assured that your business is running efficiently and securely.

Managing dedicated servers involves tasks such as initial setup, ongoing maintenance, security measures, and monitoring to ensure optimal performance and security. The following is a guide on how to manage dedicated servers:

1. initial setup::

• Configuring a server: Purchasing or leasing a dedicated server from a hosting provider or data centre.
• Choose an operating system: Select the operating system (OS) that best suits your needs, such as Linux (e.g., Ubuntu, CentOS) or Windows Server.
• Configure Network Settings: Set up the network configuration, including IP address, DNS settings, and firewall rules.

1. remote access::

• Use remote management tools: Use tools such as SSH (for Linux) or Remote Desktop Protocol (RDP) (for Windows) to access the server remotely.
• Secure remote access: Ensure secure remote access using strong authentication methods such as SSH keys or VPN connections.

1. security measure::

• Install security updates: Regularly apply operating system updates and patches to address security vulnerabilities.
• Configure Firewall: Set up a firewall to control incoming and outgoing traffic and allow only necessary ports and services.
• Implementation of security software: Installation of anti-virus, intrusion detection/prevention systems and other security tools to prevent malware and unauthorised access.
• Enhanced Server Configuration: Follow security best practices to securely configure servers, such as disabling unnecessary services, restricting user permissions, and using encryption where appropriate.

1. Monitoring and Performance Optimisation::

• Monitor server health: Use monitoring tools to track server resource usage (CPU, memory, disk, network) and detect performance issues or anomalies.
• Optimise performance: Configure server settings and applications to maximise performance, such as adjusting resource allocation, optimising database settings and caching frequently accessed data.
• Implement backups: Regularly back up critical data and configurations to prevent data loss in the event of hardware failure, accidental deletion, or security breaches.

1. maintenance::

• Perform routine maintenance tasks: schedule regular maintenance activities such as disk defragmentation (for Windows), disk cleanup, log rotation and database optimisation.
• Monitor Logs: Examine server logs for errors, warnings, and security-related events and take appropriate action to resolve any problems found.
• Updating software: Keeping server software up-to-date by installing patches, updates, and new releases to address bugs, security vulnerabilities, and performance improvements.

1. Disaster recovery planning::

• Develop a Disaster Recovery Plan: Develop a plan outlining procedures for restoring server functionality in the event of a disaster such as hardware failure, data corruption, or cyber attack.
• Testing of backup and recovery procedures: Backup and recovery procedures are tested periodically to ensure data integrity and to verify that the system can be effectively recovered in the event of an emergency.

By following these steps and proactively managing your dedicated servers, you can ensure their security, reliability and optimal performance for your business or organisation.