Packet Security Gateways With Dynamic Policies for Fast Filtering
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Solution Overview
Problem
Existing network protection systems are reactive rather than proactive, and scalable proactive solutions are infeasible due to the high time requirements for high-resolution filtering in large networks, especially with low-latency applications like VoIP.
Innovation Solution
Implementing packet security gateways with dynamic security policies that allow for packet transformation functions, configured in series, to filter and manage network traffic efficiently, using a security policy management server to manage and update these policies.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If high-resolution filtering is implemented to protect networks proactively, then network security is improved, but the time required for filtering increases making it infeasible for large networks
Solution Approach 1:
The network is divided into multiple zones with different security requirements, and filtering is performed at strategic boundary points rather than uniformly across the entire network. This segmentation allows high-resolution filtering to be applied where most needed while reducing overall filtering time through parallel processing and selective application.
Solution Approach 2:
Security policies are pre-configured and cached before actual traffic filtering begins. The system performs preliminary analysis of traffic patterns and pre-computes filtering decisions for common scenarios, enabling faster real-time filtering without sacrificing security resolution.
2Reliability
If proactive network protection is implemented, then attack prevention is improved, but scalability to larger networks deteriorates
Solution Approach 1:
The proactive protection system is segmented into distributed security gateways deployed throughout the network rather than a single centralized filter. Each gateway independently enforces security policies for its local zone, enabling the system to scale to large networks while maintaining proactive attack prevention capabilities.
Solution Approach 2:
Security gateways are designed with multi-functionality, handling multiple security functions (filtering, transformation, monitoring) and supporting various packet types and protocols. This universal design allows the same infrastructure to scale efficiently across diverse network environments without requiring separate specialized systems.
3Adaptability or versatility
If dynamic security policies with packet transformation functions are implemented, then security management flexibility is improved, but system complexity increases
Solution Approach 1:
Security policies are made dynamic and adaptable through automated policy generation from traffic flow data and threat intelligence. The system continuously adjusts filtering rules and transformation functions based on observed network conditions, providing flexibility without requiring manual configuration of complex policy sets.
Solution Approach 2:
The security system performs self-configuration by automatically generating security policies from analyzed traffic patterns and threat data. This self-service capability reduces the complexity of manual policy management while maintaining high adaptability to changing security requirements.
Data Source
AI summary
Methods and systems for protecting a secured network are presented. For example, one or more packet security gateways may be associated with a security policy management server. At each packet security gateway, a dynamic security policy may be received from the security policy management server, packets associated with a network protected by the packet security gateway may be received, and at least one of multiple packet transformation functions specified by the dynamic security policy may be performed on the packets.