Incident Response
Rapid containment, eradication, and recovery led by senior responders.
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Specialized
OT/ICS Security
Specialized assessments for industrial control and OT environments.
What it is
Operational technology does not tolerate the testing IT networks shrug off. We assess industrial environments the way they must be assessed: passively first, with safety and availability as the binding constraint, focusing on the IT/OT boundary where nearly every real incident has begun.
How we do it
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1
Passive asset discovery
Traffic is captured and analysed rather than probed, so controllers and sensors are never interrogated by a scanner.
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2
Protocol analysis
Modbus, DNP3, S7, EtherNet/IP and OPC UA traffic reviewed for authentication, integrity and unexpected commands.
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3
IT/OT boundary review
The conduit between corporate and industrial networks — jump hosts, historians, remote access and dual-homed machines.
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4
Purdue model mapping
Where your architecture actually sits against the reference model, and which levels can talk to which.
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5
Remote access review
Vendor connections and support tunnels, historically the most common route into an industrial network.
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6
Safety-bounded validation
Any active testing is agreed in writing, scheduled around operations, and stopped the moment a process is affected.
What's included
- Passive-first methodology
- Industrial protocol traffic analysis
- IT/OT conduit and boundary assessment
- Purdue level mapping of the real architecture
- Vendor remote access review
- IEC 62443 aligned findings
Who needs it
- Manufacturing plants with connected production lines
- Utilities, water and energy operators
- Any operator where downtime is measured in lost production, not tickets
Deliverables
- Passive asset inventory of the OT estate
- Network architecture diagram as found, against Purdue
- Conduit and remote access risk register
- Remediation plan sequenced around maintenance windows
Compliance relevance
Frequently asked questions
Yes — the passive phase requires no interaction with control devices at all. Active testing is optional, separately agreed, and normally scheduled into a planned outage.
The opposite. Legacy controllers cannot be patched, so the protection has to come from segmentation, conduit control and monitoring — which is exactly what this assessment evaluates.
Where you want us to. Vendor remote access is often the weakest link, and vendors frequently need to be part of the remediation conversation.
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