Segmented ZTNA Access Control Using Chained Firewall Requests

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Solution Overview

Problem

Existing ZTNA systems do not support multi-level, segmented firewall implementations, rendering segment network security appliances ineffective as they lack the mechanism for multi-layer ZTNA processing.

Innovation Solution

Implementing a system where a perimeter network security appliance receives a ZTNA request, applies initial access control, and generates chained requests to segment network security appliances using ZTNA tags or certificates, allowing for differentiated access control across network segments.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If a traditional ZTNA system is implemented with a single firewall level, then access control is simplified and easier to manage, but multi-level segmented network access control cannot be achieved

Engineering Contradiction:
Improvemulti-level segmented network access controlVSAvoidfirewall implementation complexity
Core Design Contradiction:
Adaptability or versatilityVSDevice complexity

Solution Approach 1:

The patent divides the network into multiple segments with different security levels, implementing ZTNA control at each segment boundary. The firewall system is segmented into multiple levels (L1, L2, L3, etc.), where each level handles access control for its specific network segment. This allows the system to achieve multi-level segmented network access control while keeping each individual firewall level relatively simple to manage.

Inventive Principle:
Principle #1Segmentation

Solution Approach 2:

The patent implements a nested structure where ZTNA certificates and authentication mechanisms are embedded across multiple firewall levels. Each nested firewall level contains its own ZTNA control logic, creating a hierarchical nested arrangement that enables multi-level access control without requiring complete system redesign at each level.

Inventive Principle:
Principle #7Nested doll (Nesting)

2Reliability

If segment network security appliances are added for multi-level control, then network security is improved, but the appliances become ineffective without multi-layer ZTNA processing capability

Engineering Contradiction:
Improvenetwork securityVSAvoidZTNA processing capability
Core Design Contradiction:
ReliabilityVSAdaptability or versatility

Solution Approach 1:

The patent designs segment network security appliances with universal ZTNA processing capability that can operate at multiple security levels. Each appliance is configured to perform ZTNA authentication and certificate validation, making them versatile enough to function effectively at any network segment level rather than being limited to a single function or level.

Inventive Principle:
Principle #6Universality (Multi-functionality)

Solution Approach 2:

The patent adds the dimension of multi-layer ZTNA processing by implementing vertical hierarchy across multiple firewall levels. Instead of horizontal scaling alone, the system creates a vertical dimension where ZTNA certificates and authentication protocols operate across L1, L2, L3 and deeper levels, enabling segment appliances to be effective through multi-dimensional processing capability.

Inventive Principle:
Principle #17Another dimension (Dimensionality change)

3Adaptability or versatility

If multi-level ZTNA processing is implemented, then segmented network access control is achieved, but session management complexity increases

Engineering Contradiction:
Improvesegmented access controlVSAvoidsession management
Core Design Contradiction:
Adaptability or versatilityVSDevice complexity

Solution Approach 1:

The patent introduces intermediary components such as certificate authorities and trust anchors that mediate session management across multiple ZTNA levels. These intermediaries handle the complexity of certificate validation, trust relationship establishment, and session state synchronization, allowing the segmented access control system to function without each individual firewall level bearing the full burden of session management complexity.

Inventive Principle:
Principle #24Intermediary (Mediator)

Data Source

PatentUS12531908B2Systems and methods for multi-level segmented ZTNA access control using resynchronization
Publication Date: 2026.01.20 FORTINET INC
  • US12531908B2 patent drawing
  • US12531908B2 patent drawing
  • US12531908B2 patent drawing

AI summary

Various embodiments provide systems and methods for applying ZTNA control in a multi-level, segmented network environment.