Dynamic TCP Settings for DDoS Resilience
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Solution Overview
Problem
Default server settings are inadequate to handle distributed denial of service (DDoS) attacks, leading to resource overload and increased recovery time, as they are optimized for normal operations rather than attack scenarios.
Innovation Solution
Automatically adjusting transport layer settings, such as TCP settings, to increase server tolerance during DDoS attacks by monitoring server conditions and making systematic changes to parameters like connection limits, memory allocation, and timeouts, while reverting to standard settings during normal operations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If default server settings are used, then the server operates optimally under normal conditions, but the server becomes vulnerable to resource overload during DDoS attacks
Solution Approach 1:
The patent implements dynamic adjustment of server settings based on real-time monitoring of attack conditions. The system automatically modifies TCP parameters such as connection limits, memory allocation, and timeout values in response to detected DDoS attacks, allowing the server to adapt its configuration from normal operation mode to attack mitigation mode and back, thereby resolving the contradiction between optimal normal performance and attack resilience
Solution Approach 2:
The patent changes specific TCP protocol parameters dynamically based on attack detection. Key parameters including connection limits, memory allocation for connection tracking, and timeout values are modified when attacks are detected. This parameter adjustment allows the server to increase tolerance to attack traffic while maintaining normal operation efficiency when under attack
2Reliability
If server settings are adjusted to increase tolerance during attacks, then server availability improves, but resource allocation becomes suboptimal during normal operations
Solution Approach 1:
The patent employs periodic monitoring of server conditions to detect attack states and trigger setting adjustments. The system continuously monitors incoming traffic patterns and server resource usage, switching between normal and attack mitigation configurations based on detected conditions. This periodic assessment ensures settings are optimized for current operational context, preventing permanent suboptimal resource allocation
3Use of energy by moving object
If default settings are maintained, then resource allocation is efficient for normal traffic, but recovery time increases after attacks
Solution Approach 1:
The patent prepares the server by pre-configuring attack mitigation settings that can be rapidly activated when attacks are detected. Rather than waiting for resource exhaustion to occur, the system proactively adjusts parameters such as connection limits and memory allocation before the server becomes overwhelmed, enabling faster recovery by preventing complete resource depletion in the first place
Data Source
AI summary
A system can monitor the server for indications of an attack and adjusts server settings accordingly. In response, the system can increase server tolerance in a systematic way to deal with DDoS by adjusting server settings appropriately. Conversely, when the server is not under attack, the settings can be adjusted to those for standard operations (e.g., adjusted downward), as they are more optimal for normal, non-attack operations.