IoT Traffic Steering via Inline Secure Forwarder for Policy Enforcement
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Solution Overview
Problem
IoT devices present a significant security challenge due to their minimal built-in security features, lack of updates, and ease of exploitation, especially in large-scale deployments, making them vulnerable entry points for cyberattacks that can spread malware across networks.
Innovation Solution
An inline secure forwarder intercepts outbound network traffic from IoT devices before NAT, extracts pre-NAT metadata, and reroutes it to a policy enforcement point for deep inspection and enforcement, using DHCP relay-based steering to configure devices to bypass default gateways and send traffic to this forwarder.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional security measures are applied to IoT devices, then security coverage is provided, but device complexity increases and performance degrades due to resource constraints
Solution Approach 1:
The patent introduces a cloud-based security intermediary that handles security functions remotely. Instead of embedding complex security mechanisms in IoT devices, the system uses a cloud security service that receives data from devices, performs security analysis, and returns instructions. This mediator approach allows security coverage without increasing device complexity.
Solution Approach 2:
The patent extracts security functions from the edge devices and relocates them to a centralized cloud platform. By taking out security processing capabilities from resource-constrained IoT devices and implementing them in the cloud, the system maintains security coverage while preserving device simplicity and performance.
2Reliability
If security features are embedded in IoT devices, then security is improved, but device performance degrades due to limited resources
Solution Approach 1:
The cloud-based security intermediary acts as a mediator that handles computationally intensive security tasks remotely. This allows IoT devices to maintain high performance for their primary functions while delegating security processing to the cloud, thus improving security without degrading device performance.
Solution Approach 2:
By extracting security processing from the device and implementing it in the cloud, the system eliminates the performance penalty associated with embedded security features. The device maintains full performance for its core functions while security is provided through remote cloud services.
3Reliability
If comprehensive security inspection is performed on all traffic, then security is improved, but network latency increases
Solution Approach 1:
The patent segments security inspection into different phases: initial traffic analysis at the network perimeter and comprehensive deep inspection only for suspicious or high-risk traffic in the cloud. This segmentation allows most traffic to pass through with minimal latency while maintaining thorough security inspection where needed.
Solution Approach 2:
The system applies partial security inspection to all traffic at the network level and reserves comprehensive deep inspection for only the necessary portion of traffic that requires it. This partial action approach maintains security while minimizing the impact on network speed and latency.
Data Source
AI summary
The technology disclosed relates to configuring IoT devices for policy enforcement. In particular, the technology disclosed relates to configuring a plurality of special-purpose devices on a network segment of a network to steer outbound network traffic to an inline secure forwarder on the network segment instead of a default gateway on the network segment. The inline secure forwarder is configured to route the outbound network traffic to a policy enforcement point for a policy enforcement.