Unknown OT assets
Nobody can say exactly which PLCs, HMIs or IoT devices are on the network, or what firmware they run.
Industrial security
OT and IoT Security Services
Most plants cannot list every PLC, HMI and IoT device on their network, and vendors often connect straight into control systems. We survey the site, build an asset inventory, split the network into Purdue and IEC 62443 zones, broker remote access, and send OT logs to Microsoft Sentinel.
Architecture
Every device in its zone, and one controlled path between IT and OT.
Pick a view: the high-level picture, the Purdue levels, the OT security controls, or the IoT security path.
The big picture on the Purdue model: who connects, the Azure cloud, the enterprise IT levels, the iDMZ, the plant OT levels and an isolated IoT zone, plus the controls that apply at every level.
The industrial network levels, from the enterprise (Level 5) down to the process (Level 0), with the iDMZ between IT and OT and an isolated safety zone.
How traffic moves from the Azure cloud, through the enterprise IT network and the iDMZ, down to the plant cells: logs flow out one way, remote access is brokered and recorded, management runs out of band, and everything else is blocked.
From the device to the cloud: device identity, edge gateways, an isolated IoT zone, secure transport, device management and threat detection.
Security risks
OT & IoT Security challenges we solve.
Too many alerts, too many accounts with too much access, and parts of the cloud no one watches. On top of that come rules such as NIST CSF 2.0, GLBA and CCPA.
Flat plant network
IT and OT share one network, so an infected laptop can reach production systems.
Open vendor access
Vendors connect directly and permanently into control networks, with no record of what they did.
Solution overview
OT & IoT Security designed for production readiness.
We survey the site, build an asset inventory, split the network into Purdue and IEC 62443 zones, broker remote access, and send OT logs to Microsoft Sentinel.
Site survey and asset inventory
A walk of the plant floor plus passive discovery, giving you a full list of PLCs, HMIs, IoT devices and firmware versions.
Purdue and IEC 62443 segmentation
Zones and conduits with an iDMZ as the only IT-to-OT path, and default-deny rules between cells.
Brokered remote access
Vendors and engineers connect with MFA through a broker in the iDMZ, and every session is recorded.
IoT device security
IoT devices and gateways in their own zones, sending data outbound only, so a cloud link never opens a path into control networks.
OT detection and log retention
OT, firewall and asset logs flow to Microsoft Sentinel, with full logs kept in immutable storage.
As-built documentation
Zone maps, conduit rules, IP and VLAN plans and the reason behind every firewall rule.
Zero Trust design
How a plant gets secured, zone by zone.
Each step leaves something working: an inventory, a zone design, enforced boundaries and OT logs your team can act on.
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Understand the business goal, current environment, risks and constraints before any design work begins.
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Design the target operating model, controls and integration points so the solution fits how the business actually runs.
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Build and configure the solution using repeatable, reviewed engineering practices, not one-off manual work.
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Test against real scenarios and security requirements before anything reaches production.
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Hand over documentation, runbooks and support so the client team can run the result with confidence.
Delivery model
5 Phases
A clear check at every step
Each step ends with a written result and a clear yes or no before the next one starts.
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02
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Nothing goes live without your sign-off
Each change must pass automatic checks and your review before it reaches production.
No lock-in
Built in your own Git and cloud accounts
Built as code
Terraform or Bicep you can rerun
Runbooks
Your team learns to run it
How we work
From site survey to OT detection, around production.
We fix the biggest risks first, keep disruption low and leave controls an auditor can test.
Survey the site
Walk the plant, trace OT data flows and build the asset inventory.
Design zones and conduits
Place each device in a Purdue level and define the IEC 62443 rules between zones.
Build around production
Deploy firewalls, switches and brokered access cell by cell, in planned windows.
Connect detection
Send OT logs to Microsoft Sentinel and tune OT-specific detections.
What you gain
Less risk, faster response and proof for auditors.
Leaders see the real threat picture. Risk goes down, and you can show you meet US security rules.
Full OT visibility
A live inventory of every asset and firmware version on the plant network.
Contained risk
Zones and conduits stop one infected device from spreading across the plant.
Audit-ready access
Every remote session goes through MFA and a broker, and is recorded.
Security tools
The security tools we work with.
Proven tools that find real threats and respond fast, in the cloud and on site.
Palo Alto Networks
Cisco Industrial Ethernet
Tenable OT Security
XONA
Cribl
Microsoft Sentinel
Azure IoT
Security FAQ
Common questions about OT and IoT security.
Short answers on alert tuning, audits and handover to your team.
Will this interrupt production?
No. Work is planned around production windows and done cell by cell, with rollback steps ready.
Do you work with our existing OT vendors?
Yes. We secure and monitor the control systems you already run, and give vendors brokered, recorded access.
Can you secure IoT devices too?
Yes. IoT devices are inventoried, placed in their own zones and limited to outbound connections.
How long does an OT security assessment take?
Usually 2 to 4 weeks per site. You get an asset inventory, a current-state network map and a prioritized roadmap.
Which OT security standards do you map to?
Zones, access and monitoring are mapped to ISA/IEC 62443 and NIST SP 800-82, and to NERC CIP for electric utilities.
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