Operational Technology (OT) environments were never designed for today’s threat landscape. From legacy SCADA systems and industrial controllers to IP-enabled cameras and sensors deployed at the edge, many OT devices lack native security controls and cannot be easily patched or upgraded. As a result, they are increasingly targeted by ransomware, espionage, and disruptive cyberattacks.

This challenge was the focus of a recent technology demonstration sponsored by CSOI, showcasing a modern, identity-first approach to securing OT devices without ripping and replacing existing networks.

Why Traditional OT Security Falls Short

Most OT networks still rely on perimeter-based defenses such as firewalls, VPNs, and static access control lists (ACLs). These models assume that anything inside the network is trustworthy. In today’s distributed environments that assumption no longer holds.

Key limitations of traditional OT security include:

• Reliance on IP addresses that can be spoofed or misused

• Flat networks that allow lateral (east-west) movement

• Little to no authentication for OT devices themselves

• Limited visibility into device-to-device communications

• High operational overhead when making access changes

As regulatory bodies and standards such as NIST Zero Trust Architecture continue to evolve, organizations are being pushed to adopt stronger, identity-based controls for OT and critical infrastructure.

CSOI’s Identity-Defined Approach to OT Security

CSOI introduces a software-defined, Zero Trust networking model purpose-built for IT, IoT, IIoT, and OT environments. Instead of trusting IP addresses or network location, CSOI enforces security at the device level using strong cryptographic identities.

At a high level, CSOI:

• Inserts a lightweight security “shim” at Layer 3.5 of the OSI model

• Assigns every onboarded device a unique cryptographic identity

• Enforces explicit authentication and authorization before any communication is allowed

• Denies all traffic by default until policy explicitly permits it

This creates what CSOI refers to as a secure, policy-defined overlay often described as a “red diamond” around protected assets.

Microsegmentation Without Network Redesign

One of the most powerful outcomes of this approach is true microsegmentation. Devices can only communicate if:

1. They are authenticated using their cryptographic identity

2. They are explicitly authorized by policy to talk to each other

This applies equally to:

• OT devices in the field

• On-prem systems in a data center

• Cloud workloads and virtual desktops

• Remote users and third-party vendors

The result is dramatically reduced attack surface and near-elimination of unauthorized lateral movement.

Securing OT Devices That Cannot Protect Themselves

During the demonstration, CSOI showed how unprotected OT devices such as IP cameras can be securely deployed in hostile or remote environments.

In a real-world example:

• An IP camera was deployed behind a small CSOI gateway

• The gateway established a secure, encrypted connection back to CSOI’s cloud-based control plane

• The camera remained invisible and inaccessible until trust was explicitly granted

• Access could be enabled or revoked instantly with a single policy change

Even outbound (egress) traffic from OT devices is controlled. Devices cannot “phone home” or communicate externally unless explicitly allowed. This is critical for preventing command-and-control callbacks and data exfiltration.

Centralized Control With Automation and APIs

CSOI includes a centralized command-and-control platform called the Conductor. From this interface, operators can:

• Onboard and monitor devices in real time

• Define and revoke trust relationships instantly

• Monitor traffic and generate alerts by protocol or behavior

• Integrate with SIEM, SOAR, and other security platforms via robust APIs

This makes CSOI particularly attractive for organizations with DevOps, SecOps, or SOC teams that need automation and rapid response capabilities.

OT, Cloud, and Remote Access in One Architecture

Beyond OT, CSOI demonstrated how the same identity-based model secures:

• AWS and other public cloud environments

• Virtual desktop infrastructure (VDI)

• Remote administrators and engineers

• Multi-cloud and hybrid deployments

Access is never based on exposed IPs or open ports. Resources remain cloaked and unreachable unless identity and policy requirements are met.

A Practical Path to Zero Trust for OT

The key takeaway from the webinar is that Zero Trust for OT does not require massive network redesigns or replacing legacy equipment. CSOI overlays identity, encryption, and policy on top of existing infrastructure, allowing organizations to:

• Protect legacy and unpatchable OT devices

• Meet evolving Zero Trust and compliance mandates

• Gain visibility and control across OT, IT, and cloud

• Reduce operational complexity and risk