Dynamic Handshake Spoofing Bypass in Performance Enhancing Proxies
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Solution Overview
Problem
Transport layer handshake spoofing in Performance Enhancing Proxies (PEPs) can interfere with host-based fallback mechanisms and transport layer negotiations, particularly in scenarios like IPv6 misconfiguration or network path failures, leading to connection issues and negotiation problems.
Innovation Solution
Implementing a selective dynamic disabling method for transport layer handshake spoofing, where the spoofing is bypassed only for connections that would interfere with host-based fallback mechanisms or transport layer negotiations, using a handshake spoofing bypass list to determine whether to send unspoofed or spoofed connection requests, and updating the list based on error messages received.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of time
If transport layer handshake spoofing is enabled in PEPs, then connection establishment speed is improved, but host-based fallback mechanisms and transport layer negotiations are interfered with
Solution Approach 1:
The system dynamically adjusts the handshake mode by maintaining a bypass list of destinations that require unspoofed handshakes. The PEP transitions from static spoofing to dynamic selective spoofing, where the handshake behavior changes based on real-time conditions and destination characteristics, resolving the contradiction between speed improvement and reliability maintenance
Solution Approach 2:
Different handshake handling approaches are applied to different destinations based on their specific requirements. The bypass list enables local quality differentiation where some destinations receive spoofed handshakes for speed while others receive unspoofed handshakes for reliability, allowing both requirements to coexist
2Productivity
If transport layer handshake spoofing is enabled in PEPs, then network performance is enhanced, but transport layer negotiation issues occur
Solution Approach 1:
The bypass list acts as an intermediary mechanism that mediates between the PEP's performance enhancement goals and the actual negotiation requirements of specific destinations. It filters which connections should use spoofing and which should use standard handshakes, preventing negotiation interference while maintaining throughput benefits
3Adaptability or versatility
If selective disabling of handshake spoofing is implemented, then compatibility with fallback mechanisms is improved, but system complexity increases
Solution Approach 1:
The system implements self-service through automatic population of the bypass list based on connection failure detection. When spoofed handshakes fail, the destination is automatically added to the bypass list without manual intervention, reducing operational complexity while maintaining adaptability
Solution Approach 2:
The system uses feedback from connection establishment outcomes to dynamically update the bypass list. Failed connections trigger automatic addition to the list, creating a self-learning mechanism that improves compatibility over time without increasing manual management complexity
Data Source
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Figure 3A
AI summary
An approach for selective dynamic disabling of transport layer handshake spoofing is provided. A local proxy node of a communications network receives request message from a respective local host for establishing a network connection with a remote host. A destination address for the network connection is determined. It is determined whether the destination address is included in a handshake spoofing bypass list, if it is determined that the destination address is included in the spoofing bypass list, a corresponding un-spoofed connection request message is transmitted to a remote proxy node associated with the remote host, in accordance with a respective handshaking protocol for the connection establishment. If it is determined that the destination address is not included in the spoofing bypass list, a corresponding spoofed connection request message is transmitted to the remote proxy node, in accordance with a respective handshake spoofing protocol for the connection establishment.