DoD Zero-Trust OT Alignment.
The Department of Defense mandates Zero Trust across all OT environments under DTM 25-003. This document details how the Trout Access Gate enables compliance without disruption, rewiring, or agents.
Zero Trust for OT Without Disruption.
Under DTM 25-003, all DoD Components must reach Target Level Zero Trust across OT environments. The DoD notes that traditional IT security tools can be “ineffective and potentially dangerous” when applied to legacy, safety-critical systems.
Trout Access Gate enables Zero Trust in OT without the cost, disruption, or complexity of conventional approaches. Each site deploys one appliance which uses an SDN overlay to insert a lightweight, identity-aware proxy in front of existing OT assets.
No Industrial Disruption
Modernizes security around legacy and unpatchable systems while maintaining full operational continuity.
Proxy + SDN Technology
Enables what traditional firewalls, agents, or cloud-ZT solutions cannot safely achieve in OT.
Battle-Tested in DIB
Proven in real production environments with unpatchable, mission-critical systems.
Up to 10x Cost Reduction
Avoids high implementation and recurring costs of cloud-based Zero-Trust enclaves.
All 7 DoD OT Zero-Trust Pillars.
The document maps Trout Access Gate capabilities to every activity and outcome across the DoD's seven Zero-Trust pillars for OT environments.
Users
Activities 1.1–1.9
Identity-centered controls, MFA, role-based access, elimination of shared accounts, and strict least-privilege enforcement for all human and machine actors.
Devices
Activities 2.1–2.7
Device inventories, deny-by-default posture, configuration protections, certificate-based identity, and secure communication enforcement for all OT NPEs.
Applications & Workloads
Activities 3.1–3.4
Secure OT application inventories, ABAC authorization, control of binaries and configuration artifacts, and digital policy with full attribution.
Data
Activities 4.1–4.7
Data classification and tagging, file monitoring and protection, DLP enforcement at the OT boundary, and database monitoring with SIEM integration.
Networks & Micro-Segmentation
Activities 5.1–5.4
Granular per-flow access rules, segmentation gateways, tiered plane segmentation, and full micro-segmentation across all PEs and NPEs.
Automation & Orchestration
Activities 6.1–6.3
Centralized policy-driven automation, attribute catalogs, version-controlled rulesets, and API-driven orchestration of Zero-Trust controls.
Visibility & Analytics
Activities 7.1–7.4
Continuous monitoring, OT-aware UEBA, anomaly detection for both human and machine actors, and automated response with SIEM export.
Designed for the Constraints the DoD Describes.
The DoD guidance states that OT Zero Trust must adapt to legacy constraints because “OT environments utilize distinct industrial control protocols… and changes may disrupt or break the environment.”
One Appliance Per Site
Each site deploys one rack-mount Access Gate. The SDN overlay inserts a proxy in front of each asset without touching wiring, switches, firewalls, PLCs, or HMIs.
Protects Unpatchable Assets
Devices that are 10, 20, or 30+ years old and cannot support agents, certificates, or patches are protected without modification.
U.S.-Built and Supported
Designed and manufactured domestically to meet defense assurance requirements. Predictable, site-based pricing that is easy to plan and scale.
Download the Full DoD Alignment Document.
Get the complete alignment analysis across all 7 DoD OT Zero-Trust pillars with detailed capability mapping, DoD guidance references, and glossary.
What's Inside
Pillar-by-pillar alignment tables mapping DoD OT-ZT mandates to Trout Access Gate capabilities. Executive summary, architecture overview, and glossary of terms.
CMMC Compliance
See how the Access Gate also addresses CMMC 2.0 requirements for defense contractors with on-premise OT systems.
Common Questions About DoD OT Zero Trust.
Zero-Trust pillars covered. The Trout Access Gate maps to every activity and outcome in the DoD's OT-specific guidance.
DTM 25-003 mandates that all DoD Components must achieve at minimum Target Level Zero Trust across all systems, including control systems and Operational Technology. It explicitly recognizes that standard IT security approaches can be ‘ineffective and potentially dangerous’ in OT environments, requiring purpose-built solutions.
The Access Gate uses software-defined networking to insert an identity-aware proxy in front of each OT asset — creating per-asset micro-DMZs. This delivers segmentation, identity enforcement, continuous monitoring, and access control without touching wiring, PLCs, HMIs, or requiring agents on endpoints.
Yes. The Access Gate operates at the network level with no requirements on endpoints. Devices that are 10, 20, or 30+ years old — including those that cannot run agents, support certificates, or accept patches — are protected through the proxy boundary without any modification.
The Access Gate creates per-asset micro-DMZs using a software-defined proxy overlay. It acts as both the Segmentation Gateway and Authentication Decision Point, enforcing identity-based flow control across all assets without VLAN redesign, recabling, or firewall rule changes.
Yes. The Access Gate aggregates identity logs, enforcement decisions, segmentation events, and protocol metadata into a unified telemetry stream that can be forwarded to enterprise SIEM/SOAR platforms for centralized monitoring and incident response.
