In the digital age, cyber attacks have become a major threat to enterprise business continuity. As a professional network security solution, High Defense IP addresses are used to protect against DDoS attacks by hiding real server IP addresses, filtering malicious traffic, and ensuring stable service running. This paper will deeply analyze the protection principle of high-defense IP, combine the technical mechanism and practical application scenarios, and reveal how to build a multi-layer defense system to deal with complex attacks.
Core principle: traffic concealment and intelligent scheduling
The core logic of the high-defense IP address is to hide the IP address of the real server and divert user access traffic and attack traffic to the high-defense node for processing. After purchasing the high-defense IP service, you need to resolve the domain name or service IP address to the high-defense IP address and set forwarding rules. In this case, all public network traffic is forwarded through high-defense IP addresses, and the IP address of the source site is completely hidden. Therefore, attackers cannot directly locate the real server, reducing the risk of targeted attacks.
The intelligent scheduling capability of high-defense IP is reflected in traffic traction and distribution. When an attack occurs, the high defense system directs all traffic, both normal and malicious, to a high defense room equipped with dedicated hardware. Based on the Deep Packet inspection (DPI) technology, the cleaning device in the equipment room analyzes traffic characteristics in real time, such as abnormal request frequency, packet size, or protocol compliance, and quickly identifies attack types (such as SYN Flood and HTTP Flood).
Flow cleaning: Precise filtration and dynamic purification
Traffic cleaning is the core defense link of high IP defense, and its process can be divided into three stages:
The first stage: traffic identification and classification
Using preset rules and machine learning models, the system distinguishes between normal traffic (such as user access requests) and attack traffic (such as forged requests generated by botnets). For example, in the Challenge Collapsar (CC) attack, the system analyzes the HTTP header integrity, session status, and request frequency to identify abnormal behavior patterns.
Phase 2: Malicious traffic filtering
The cleaning device uses a variety of techniques to remove attack traffic:
Whitelist mechanism: Blocks known malicious IP addresses (such as attack sources in the blacklist) and allows only trusted IP addresses in the whitelist to pass through.
Protocol compliance check: Filters out packets that do not comply with HTTP/HTTPS standards to block attacks that exploit protocol vulnerabilities.
Rate limit and Threshold control: Dynamically limits the request frequency of a single IP address (for example, the number of requests per second) to prevent resource exhaustion.
The third stage: normal flow reinjection
The cleaned legitimate traffic is distributed to the source server using the load balancing technology to ensure that services are not switched over. For example, when an e-commerce platform is attacked by 100,000 HTTP Flood attacks per second, the high-defense IP address can complete traffic cleaning within 50 milliseconds, and only 5% of legitimate requests are forwarded to the source station, ensuring the stable operation of the transaction system.
Multilayer defense systems: Technology collaboration and dynamic response
High-defense IP does not rely on a single technology, but improves the overall protection capability through a multi-tier defense strategy:
Black hole route defense at the network layer When the attack traffic exceeds the preset threshold, malicious traffic is diverted to the black hole route and packets are discarded to avoid pressure on servers. BGP Anycast leverages globally distributed nodes to respond to traffic nearby, reducing latency and spreading attack stress. For example, attacks targeting European users can be intercepted by the Frankfurt node, while Asian traffic is handled by the Singapore node.
Application layer protection includes Web application firewall (WAF), integrated WAF module, intercepts SQL injection, XSS cross-site scripting and other application layer attacks, and supplements the high IP protection at the protocol layer. Dynamic authentication mechanisms that trigger captCHA validation for suspicious requests (such as Google reCAPTCHA) differentiate human users from automated attack tools.
High-defense IP addresses Enable on-demand expansion of defense bandwidth and computing resources. For example, during the "Double 11" promotion period, a live broadcast platform temporarily increased the defense bandwidth from 10Gbps to 50Gbps, successfully resisting peak attacks.
Real-time monitoring and intelligent operation and maintenance
High IP protection relies on full link monitoring and automated response:
1. Real-time data panel
Provides a visual display of key indicators such as bandwidth utilization, attack types, and cleaning success rate. The administrator can use the dashboard to track the protection status in real time. For example, when the delay of a node in an area spikes, the administrator can switch the standby line immediately.
2. Automatic alarm and emergency switchover
The preset rules trigger an alarm (for example, the packet loss rate exceeds 5%) and automatically enable the failover mechanism. For example, when the active cleaning node fails, traffic is switched to the standby node in seconds to ensure no service interruption.
3. Attack log and traceability analysis
Record the attack source IP address, attack vector, and duration, and generate a compliance report. After analyzing logs, a financial institution found that 90% of attacks originated from specific AS numbers and cooperated with the carrier to block this IP segment to reduce subsequent risks.
In summary, it can be seen that the core value of high IP defense is to transfer the attack pressure to the professional infrastructure, and ensure the concealment and stability of the enterprise source station.
