Proxy Gateway IP Mapping for DDoS Traffic Filtering
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Solution Overview
Problem
Existing DDOS attack mitigation systems are costly and often ineffective in identifying and blocking malicious attacks in a timely manner, leading to service disruptions and resource overloads.
Innovation Solution
A proxy gateway that announces an IP subnet, generates a cryptographic hash from a secret and a digital identifier, and routes IP packets to a redirect node for validation and internal IP address mapping, hiding the resource and encrypting destination addresses to protect against DDOS attacks.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If Anycast networking is used to distribute attack traffic to multiple data centers, then traffic load is distributed and some protection is provided, but attacking traffic must still be processed and filtered by application or firewall which consumes expensive resources
Solution Approach 1:
The system performs preliminary filtering of attack traffic at the network level before it reaches the application layer. The ingress network device filters malicious packets based on protocol analysis and pattern matching, preventing them from consuming application server resources. This preliminary action at the network edge resolves the contradiction by providing effective DDOS mitigation without the expensive resource consumption of application-level filtering.
Solution Approach 2:
The invention introduces an intermediary filtering layer between the network and application layers. The ingress network device acts as a mediator that analyzes and filters traffic using protocol-specific rules and patterns before traffic reaches the application firewall or server. This intermediary approach provides effective DDOS protection while avoiding the high resource costs of traditional application-level firewalls.
2Reliability
If traditional firewall or application-level filtering is used to block malicious traffic, then attack traffic can be identified and blocked, but it consumes expensive computing resources and may not respond in a timely manner
Solution Approach 1:
The invention replaces the mechanical processing approach of traditional firewalls with protocol-based intelligent filtering. Instead of blindly inspecting and processing every packet through expensive firewall rules, the system uses protocol analysis to identify and filter malicious traffic patterns at the network level. This substitution reduces both resource consumption and response time by filtering attacks before they require complex application-level analysis.
Solution Approach 2:
The system extracts and filters attack traffic at the network ingress point, removing malicious packets from the traffic flow before they can consume application resources. By taking out the filtering function from the application layer and placing it at the network layer with protocol-based detection, the system achieves rapid response times without the resource overhead of traditional firewall processing.
3Reliability
If rate-limiting and threshold detection are used to identify DDOS attacks, then some attack patterns can be detected, but these mechanisms may not be successful in identifying and blocking malicious attacks effectively
Solution Approach 1:
The invention changes the detection parameters from simple rate-limiting thresholds to protocol-based pattern recognition. Instead of relying solely on packet rate thresholds that can be easily bypassed, the system analyzes protocol structures, fields, and patterns to identify malicious traffic. This parameter change improves detection accuracy while maintaining manageable system complexity through protocol-specific rule sets.
Solution Approach 2:
The system implements dynamic filtering rules that adapt to different protocol types and attack patterns. Rather than static threshold detection, the ingress network device uses protocol-specific dynamic rules that can respond to varying attack characteristics. This dynamic approach improves detection reliability without excessive complexity by focusing on protocol behavior rather than fixed thresholds.
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.