OT Security Assessment
An IEC 62443-aligned assessment of your OT/ICS environment — network architecture, device hardening, zone segmentation, patch status, and access controls.
IEC 62443SCADADCSPLC Hardening
OT Cyber AssuranceSecurity for
Security for
IndustrialOperations
Security for the systems that run your operations. We assess and harden your OT and ICS environments — SCADA, DCS, and PLC systems — using passive, production-safe methods, so you improve security without putting uptime or safety at risk.
IEC 62443NIST 800-82Purdue ModelSCADA / DCS / PLCICS
OT Zone SegmentationIllustrative
Level 4Enterprise / IT
Level 3.5IT/OT DMZ
Level 3Operations
Level 2Supervisory (SCADA/HMI)
Level 0-1Control (PLC/RTU)
// Illustrative Purdue-model zone view
Methodology
How we work.
A structured, production-safe process — from passive discovery through to ongoing monitoring.
01 · Discovery
Discovery
We passively map your OT environment — devices, protocols, communication paths, zones, and external connections — without disrupting operations.
02 · Analyse
Analyse
Manual review of OT architecture, network segmentation, firmware versions, patch status, and configurations, assessed against IEC 62443 security levels.
03 · Remediate
Remediate
Prioritised, OT-safe remediation guidance that balances security improvements with operational requirements and safety constraints.
04 · Monitor
Monitor
Passive, OT-aware monitoring that observes industrial protocols without affecting production availability.
The OT Challenge
Why OT security is different.
OT systems control physical processes, so the priorities are different: safety and uptime come before everything else. Add legacy equipment, proprietary protocols, and firmware that can't easily be patched, and standard IT security methods often don't apply — and can cause harm if used without care.
As IT and OT converge, more industrial systems are network-connected than ever. That widens the attack surface and makes OT a target for ransomware and other threats. Securing it takes methods built for the operational context, not lifted from IT.
OT Protocol Risk OverviewIllustrative
- Modbus TCPNo Auth
- DNP3Legacy Risk
- OPC-UAConfigurable
- EtherNet/IPExposed
- PROFINETSegmented
// Illustrative view of common OT protocol risks
Engagement
What working with us looks like.
Planned around your operations
We agree scope, zones, and rules of engagement up front — and every step is planned around your maintenance windows, change freezes, and safety requirements.
Passive and production-safe
All discovery is passive. We observe industrial protocols without generating traffic that could affect PLCs, RTUs, or real-time control.
Practitioners who know OT
You work with practitioners who understand both the security and the operational side — not IT consultants learning OT on your site.
A debrief and roadmap
We walk your operations and security teams through every finding and leave you with a practical, prioritised roadmap tied to IEC 62443 security levels.
What We Do
Built for industrial constraints.
OT security coverage built for the constraints of industrial environments — assessment, segmentation, asset visibility, and governance.
Network Segmentation & Vulnerability Management
Zone and conduit design aligned to ISA/IEC 62443 — DMZ architecture, firewall rule reviews, and IT/OT boundary hardening — together with OT-safe vulnerability and patch management that respects legacy constraints and vendor patch cycles.
Zone & ConduitDMZ DesignIT/OT BoundaryPatch Management
Asset Inventory & Visibility
Passive discovery and cataloguing of every OT asset — PLCs, RTUs, HMIs, engineering workstations, historians, and field devices — for complete OT visibility.
Asset DiscoveryOT InventoryCMDBVisibility
OT Governance & Policy
OT-specific security policies, procedures, and governance aligned to IEC 62443 and NIST SP 800-82 — covering remote access, change management, and incident response.
IEC 62443NIST 800-82Policy DesignGovernance
Deliverables
What you receive.
A practical set of outputs your operations, security, and leadership teams can act on.
OT Security Assessment Report
A full technical and executive report covering every finding, with IEC 62443 security-level ratings, exploitability, safety-consequence mapping, and risk-ranked recommendations.
Asset Inventory & Network Map
A complete inventory of discovered OT assets with a visual network topology map — zone boundaries, communication paths, and IT/OT interconnections documented and verified.
Risk Remediation Roadmap
A sequenced remediation plan that balances security improvements with operational constraints — prioritised by risk, safety impact, and implementation complexity.
Policies & Playbooks
OT-specific security policies, incident response playbooks, and change-management procedures, aligned to IEC 62443 and NIST SP 800-82.
OT security by people who understand operations.
Our OT practitioners have assessed industrial environments across manufacturing, energy, water, and critical infrastructure. We understand both the cybersecurity and the operational constraints that general IT security firms tend to miss.
Safe
Passive-only
Passive-only assessment — no impact on production systems.
IEC
62443 aligned
IEC 62443 aligned across every assessment and remediation step.
Full
IT/OT coverage
Full IT/OT convergence coverage — not just the OT-side network.
IT/OT
Both sides
Practitioners who understand both IT security and OT operations.
IEC 62443NIST SP 800-82Purdue ModelSCADA SecurityIT/OT Convergence
FAQ
Common questions
No. All discovery is passive — we observe your network without generating traffic that could affect PLCs, RTUs, or real-time control. Every engagement is scoped around your maintenance windows and safety requirements.
Get Started
Talk to us about your OT environment.
Tell us about your industrial environment and what's prompting the review. We'll reply with a clear next step.
Safety first, always
Every engagement is scoped to avoid any disruption to production, safety systems, or real-time controls.
Response within 24 hours
A senior OT practitioner reviews your enquiry and replies.
Confidential by default
Everything you share stays private, and we can sign your NDA before the first call.
Call us —+91 8007024111
hello@armouriq.com
Ready When You AreLet's talk about your OT
Let's talk about your OT
environment.
Whether you're starting with an assessment or building an ongoing OT security programme, we'll work around your operations — manufacturing, energy, water, or critical infrastructure. No sales pitch, just practitioner-led OT security.