Proxy Gateway Hash Verification for DDoS Traffic Filtering
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Solution Overview
Problem
Existing DDOS attack mitigation systems are costly and inefficient, as they consume expensive resources and often fail to effectively identify and block malicious attacks in a timely manner, leading to service disruptions.
Innovation Solution
A proxy gateway that announces an IP subnet, encrypts and hashes IP packets using a secret key, and redirects them to a resource only if the hash result matches, using a mapping protocol to validate and route traffic through internal IP addresses and ports.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If traditional DDOS mitigation systems are used to filter and block malicious traffic, then attack detection capability is improved, but resource consumption increases and service disruption occurs
Solution Approach 1:
The patent implements preliminary action by pre-computing and caching hash values for legitimate traffic patterns before attacks occur. The system maintains a cache of expected traffic hash signatures, allowing it to rapidly compare incoming traffic against known good patterns without performing full inspection during the attack, thus reducing real-time resource consumption while maintaining detection accuracy
Solution Approach 2:
The patent introduces an intermediary hashing mechanism that transforms complex traffic analysis into simple hash comparisons. Instead of directly analyzing full packet contents during attacks, the system uses hash functions as intermediaries to represent traffic patterns, enabling fast comparison operations that consume fewer resources while maintaining detection capability
2Reliability
If rate-limiting and filtering mechanisms are deployed to mitigate DDOS attacks, then service protection is improved, but false positives increase and legitimate traffic is blocked
Solution Approach 1:
The patent applies parameter changes by transforming the protection mechanism from fixed threshold-based rate-limiting to dynamic hash-based pattern matching. Instead of using static parameters like fixed request rates, the system dynamically computes hash values that capture the essence of legitimate traffic patterns, allowing adaptive protection that reduces false positives while maintaining service protection
Solution Approach 2:
The patent substitutes mechanical filtering systems with cryptographic hash-based verification. Instead of using traditional firewall rules and rate-limiting mechanisms that rely on manual configuration and fixed parameters, the system employs hash functions to automatically verify traffic legitimacy, replacing cumbersome mechanical filtering with more intelligent cryptographic verification
3Reliability
If multiple data centers are used to distribute attack traffic via Anycast networking, then attack resilience is improved, but infrastructure cost increases
Solution Approach 1:
The patent applies copying by creating distributed copies of the hash cache across multiple network nodes. Instead of requiring multiple full data centers with complete service stacks, the system replicates essential hash verification data across lighter-weight nodes, enabling attack traffic distribution through Anycast while reducing the resource requirements and costs associated with each individual data center
Data Source
AI summary
Disclosed here are systems and methods for optimized resource availability. In some variants a proxy gateway is configured among the resource and a source and wherein the proxy gateway announces an IP subnet. The proxy gateway receives an IP packet from the source wherein the proxy gateway provides to the IP packet a selective access to the resource. In some variants a mapping associates (at least) the resource with the IP packet or other network traffic destined to the IP subnet. Alternatively, or additionally a hash result may be generated by encrypting or otherwise transforming a secret or a digital identifier of the source (or both) wherein an expression of several bits of the hash result is installed into a temporarily repurposed bit set of the IP packet