Proxying TCP Fingerprints to Mask Proxy Identity
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Solution Overview
Problem
In computer networking, destination hosts may detect the presence of a proxy server between them and a source host, leading to potential blocking of communications, especially when sensitive data is being probed.
Innovation Solution
A proxy server implements a method to proxy TCP fingerprints and OS-specific information of a source host, using this information to establish a communications connection with a destination host and prevent detection of the proxy server, while also allowing the source host to communicate effectively.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a proxy server is implemented between source host and destination host to support traffic exchange, then communication capability is improved, but the proxy server exposes its own TCP fingerprints to the destination host which can detect the inconsistency between proxy's TCP fingerprints and the source host's identity information, leading to blocking
Solution Approach 1:
The proxy server captures TCP fingerprint characteristics from the source host during the connection establishment phase and replicates these fingerprints when communicating with the destination host. This copying of fingerprint patterns allows the proxy to mask its true identity and present the source host's network characteristics to the destination, preventing detection of the proxy's presence while maintaining communication functionality.
Solution Approach 2:
The proxy server acts as an intermediary that mediates between the source host and destination host by intercepting and modifying TCP handshake packets. It captures the source host's TCP fingerprint during the initial connection and then uses these captured characteristics to establish connections with the destination host, effectively hiding the proxy's own identity while enabling traffic exchange.
2Reliability
If the source host limits the type and amount of traffic it responds to in order to protect against TCP fingerprinting, then security is improved, but the proxy server cannot support the traffic exchange between source host and destination host
Solution Approach 1:
The proxy server serves as a mediator that receives and processes traffic on behalf of the source host. By capturing TCP fingerprints during the connection establishment phase and using these captured characteristics for subsequent communications, the proxy enables full traffic exchange without requiring the source host to limit its responses, thus maintaining both security and productivity.
Solution Approach 2:
The proxy server performs preliminary action by capturing the source host's TCP fingerprint characteristics during the initial connection establishment phase. This advance capture of fingerprint data allows the proxy to pre-configure its response characteristics, enabling it to support ongoing traffic exchange with the destination host without requiring the source host to modify its traffic patterns for security reasons.
Data Source
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AI summary
In some embodiments, a computer-implemented method for an automated proxying TCP fingerprints comprises: receiving, at a proxy server, a request from a source host, to establish a first communications connection between the source host and a destination host; establishing, by the proxy server, a second communications connection between the source host and the proxy server; determining a plurality of fingerprint values specific to the source host; establishing by the proxy server, using at least the plurality of fingerprint values specific to the source host, a third communications connection between the proxy server and the destination host; facilitating, by the proxy server, communications between the source host and proxy server via the second communications connection and between the proxy server and the destination host via the third communications connection.