Network Device Failsafe Protocol for Security Policy Bypass
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Solution Overview
Problem
Configuring and maintaining network security policies for headless or remotely accessible devices is challenging due to the risk of network traffic errors, security protocol failures, and the need for costly failover mechanisms, leading to potential loss of access and control, especially when content filtering rules change or devices become unreachable.
Innovation Solution
Implementing a failsafe protocol within network devices that allows remote access and control independent of the user-defined network security policy, enabling bypass of firewall filters and allowing dataflow through secure or unsecured protocols to maintain access and modify security policies without rebooting or resetting devices to factory defaults.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a network security policy is configured to restrict access and filter content, then device security is improved, but accessibility and ease of configuration are worsened
Solution Approach 1:
The patent introduces a failsafe protocol as an intermediary communication channel that operates independently of the network security policy. This mediator allows administrators to access devices even when the security policy blocks normal access, resolving the contradiction between maintaining security restrictions and preserving administrative accessibility.
Solution Approach 2:
The failsafe protocol is configured in advance on devices before security policies are applied. This preliminary configuration ensures that an alternative access path exists before security restrictions take effect, allowing administrators to maintain control without needing to bypass or disable security policies during emergencies.
2Reliability
If failover mechanisms with standby devices are implemented, then system reliability is improved, but cost and device complexity increase
Solution Approach 1:
The patent extracts the failover capability from the traditional standby device model and embeds it directly within each network device as a failsafe protocol. This eliminates the need for separate standby devices while maintaining failover functionality, reducing system complexity and cost while preserving reliability.
Solution Approach 2:
Each network device is equipped with its own failsafe protocol capability, allowing it to self-manage access control during security policy failures. Instead of relying on external standby devices, each device independently provides its own failsafe access mechanism, simplifying the overall system architecture.
3Ease of operation
If a device reboots to recover from errors, then temporary access issues are resolved, but security protocol errors embedded in the device are not fixed and downtime occurs
Solution Approach 1:
The failsafe protocol serves as a mediator that allows communication with the device during reboot scenarios. Administrators can use this intermediary channel to initiate reboots and monitor device status without being blocked by security policy errors, enabling recovery while maintaining communication capability.
4Ease of operation
If network security policy is disabled to regain device access, then accessibility is improved, but device security is compromised
Solution Approach 1:
The failsafe protocol provides an intermediary access path that does not require disabling the network security policy. Administrators can access devices through this mediator while the security policy remains active and intact, maintaining both accessibility and security simultaneously.
Data Source
AI summary
A remote network device having a network security policy, includes: a firewall component embedded within the network device to filter data flow with a network; a user-defined network security policy for the firewall component to define constraints on data flows permitted by the network device; and a failsafe protocol to enable remote control of the device independent of the user-defined network security policy and the firewall filter.