VPN Loopback Tunnel for Network Restriction Circumvention

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Solution Overview

Problem

Users can circumvent network access restrictions by connecting to alternative Wi-Fi or cellular data connections, rendering existing control methods ineffective.

Innovation Solution

Implementing connection management software that establishes a VPN loopback tunnel on devices, allowing the software to detect and block circumvention attempts, even on devices with restrictive operating systems.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If connection management software is installed to detect and block circumvention attempts, then network restriction effectiveness is improved, but device complexity increases

Engineering Contradiction:
Improvenetwork restriction effectivenessVSAvoiddevice complexity
Core Design Contradiction:
ReliabilityVSDevice complexity

Solution Approach 1:

The patent introduces a VPN tunnel as an intermediary mechanism between the connection management software and the network stack. This VPN tunnel serves as a mediator that allows the software to monitor and control network traffic without requiring direct access to the network stack, thereby improving reliability while managing device complexity through a standardized interface.

Inventive Principle:
Principle #24Intermediary (Mediator)

Solution Approach 2:

The patent segments the network control function into separate components: the connection management software, the VPN tunnel intermediary, and the network stack. This segmentation allows each component to operate independently with defined interfaces, improving reliability through modular design while reducing overall system complexity by distributing responsibilities.

Inventive Principle:
Principle #1Segmentation

2Ease of operation

If VPN loopback tunnel is established to enable software control, then ease of operation is improved, but device complexity increases

Engineering Contradiction:
Improveease of operationVSAvoiddevice complexity
Core Design Contradiction:
Ease of operationVSDevice complexity

Solution Approach 1:

The VPN loopback tunnel acts as an intermediary that simplifies the interaction between connection management software and the network stack. By establishing this standardized tunnel, the software can easily monitor and control traffic without needing complex direct access mechanisms, thereby improving ease of operation while the tunnel itself manages the underlying complexity.

Inventive Principle:
Principle #24Intermediary (Mediator)

3Difficulty of detecting and measuring

If third-party software is permitted to access network stack, then detection capability is improved, but operating system security is worsened

Engineering Contradiction:
Improvedetection capabilityVSAvoidoperating system security
Core Design Contradiction:
Difficulty of detecting and measuringVSObject-affected harmful factors

Solution Approach 1:

The patent introduces a VPN tunnel as an intermediary layer between third-party connection management software and the network stack. This mediator allows the software to detect and monitor network traffic through standardized VPN interfaces without granting direct access to the network stack, thereby improving detection capability while preserving operating system security by preventing unauthorized direct access.

Inventive Principle:
Principle #24Intermediary (Mediator)

Solution Approach 2:

The patent segments the network access control into separate functional layers: the VPN tunnel interface layer and the network stack layer. This segmentation allows third-party software to operate at the VPN layer for detection purposes while the network stack maintains its security isolation, resolving the contradiction between detection capability and security.

Inventive Principle:
Principle #1Segmentation

Data Source

PatentUS20250030768A1Network Restriction Circumvention Management
Publication Date: 2025.01.23 COMCAST CABLE COMM LLC
  • US20250030768A1 patent drawing
  • US20250030768A1 patent drawing
  • US20250030768A1 patent drawing

AI summary

Systems, apparatuses, and methods are described for the management of network access. Implementations may utilize a data service, such as a virtual private network (VPN). A VPN may be configured to detect the situations in which a user may be attempting to circumvent a local network restriction. If a local network Wi-Fi gateway restricts Internet access, but a user device circumvents that gateway to reach another network, such as the VPN, via a different local connection (e.g., via a neighbor's Wi-Fi gateway, or a cellular data connection), then notifications may be sent to a controlling device, such as a parental device, which in turn can be used to deny access. A local gateway and/or a network connection management application comprising a VPN module on the user device may also cooperate in the detection of this circumvention.