The Risk Shift

Industrial environments were never designed to be exposed. For years, operational technology (OT) systems ran separately from IT, and that separation acted as a form of protection. As connectivity increased, that assumption stopped holding.

Today, most industrial networks are connected in some form. This has improved efficiency and visibility, but it has also created a direct path for attackers. Most attacks on OT environments now begin in IT systems, which is where the real risk sits.

How Attacks Reach OT

Attackers rarely compromise OT systems directly. They enter through IT weaknesses such as phishing emails, stolen credentials, exposed remote access, or unpatched IT systems. From there, they move laterally until they reach OT networks. In many organisations, the IT/OT boundary is far less controlled than expected.

Industry reporting from Dragos Inc. shows that industrial organisations remain primary ransomware targets, with manufacturing being among the most affected sectors. The impact is not limited to data loss. It increasingly causes:

• Production downtime
• Supply chain disruptions
• Safety and operational risks

A recent cyber incident affecting Jaguar Land Rover illustrated how quickly these attacks can halt manufacturing operations, showing that OT disruptions are not theoretical—they have real financial and operational consequences.

Why OT Is Hard to Secure

Securing OT is fundamentally different from IT. These systems were built for reliability and uptime, not cybersecurity. Common challenges include:

• Limited patching options because downtime is costly
• Legacy devices or unsupported firmware
• Industrial protocols, such as Modbus or DNP3, that standard IT tools cannot monitor
• Incomplete visibility into connected assets

This gap between expectation and reality delays detection and makes response more difficult. Without visibility and control, even small incidents can escalate quickly.

What Reduces Risk

Improving OT security does not rely on more tools; it relies on prioritising fundamentals:

1. Visibility
Organisations need a complete and accurate view of their OT environment, including every device, connection, and communication path. Passive monitoring often provides the best solution without disrupting operations.

2. Segmentation
Weak segmentation is a common problem. A secure IT/OT boundary should:

• Restrict communication to only what is required
• Monitor and log all traffic crossing the boundary
• Remove implicit trust between networks

Effective segmentation is about enforcement, not just network separation.

3. Operational Alignment
IT and OT teams often operate independently, creating blind spots. Effective security requires:

• Shared visibility across IT and OT
• Incident response plans that include OT systems
• Clear ownership and coordination during incidents

Attackers already operate across IT and OT; defence must do the same.

A Practical Approach to OT Security

OT security is no longer a niche concern. IT and OT are now part of a single connected environment with shared risk, and treating them separately creates gaps in both visibility and control. Organisations that are making progress are:

• Designing security across both IT and OT environments
• Limiting exposure through controlled access and segmentation
• Preparing for incidents based on operational impact rather than only technical failure

From AVIANET’s perspective, the first step is always clarity. Organisations need to understand what is connected, how systems interact, and how to respond effectively. That is the foundation for meaningful protection.

Where to Start

If an attacker moved from your IT environment into OT today, would you see it and stop it? Most organisations are still closing that gap.

AVIANET partners with industrial and infrastructure teams to:

• Improve visibility across OT networks
• Strengthen segmentation between IT and OT
• Build incident response capabilities tailored to operational environments

Take action before an incident forces it.

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🌐 www.avianet.aero