OT & IoT Security
Protect production lines, plants and connected products from cyberattacks, with security that respects uptime, safety and the realities of industrial systems.
Is this for you?
You might need this if…
Your OT network is now connected to IT, the cloud or remote suppliers, and nobody has a full picture of those connections.
Production runs on controllers and old Windows versions that can’t be patched without stopping the line.
NIS2 now covers your operations, and you need to show how plants and control systems are protected.
You sell connected products, and customers or the Cyber Resilience Act now demand proof of their security.
What we deliver
What it covers
OT/ICS security assessments
We assess your industrial control systems, networks and remote access against IEC 62443, using passive methods that do not disturb production. You get an asset inventory, a risk picture and a roadmap that fits your maintenance windows.
Industrial network segmentation
We design zones and conduits that separate OT from IT and critical cells from each other, with controlled remote access for suppliers. An incident in the office network no longer reaches the production floor.
OT monitoring and threat detection
We deploy passive monitoring that understands industrial protocols, keeps a live asset inventory and detects unusual commands or connections. Alerts can feed into your SOC, so IT and OT threats are seen together.
Securing connected products
We help build security into connected products through threat modelling, secure updates, vulnerability handling and testing, in line with the Cyber Resilience Act and IEC 62443. Security becomes part of the product lifecycle, not an afterthought.
Our approach
How we work
01
Discover
Passive network monitoring and site walk-throughs build an inventory of assets, connections and remote access paths.
02
Assess
Risks are evaluated against IEC 62443 and your regulatory obligations, together with operations, maintenance and safety staff.
03
Protect
Segmentation, secure remote access and hardening are implemented step by step, aligned with planned stops and maintenance windows.
04
Monitor
Continuous OT monitoring and joint IT/OT incident routines keep the environment under watch as it changes.
Best practices
What we bring to every engagement
Safety and uptime come first
Every measure is planned with operations and maintenance and carried out in agreed windows.
Passive before active
Assets are discovered by listening to network traffic, not by scanning fragile controllers.
Zones and conduits
Segmenting according to IEC 62443 means a compromise in one area stays there.
Control supplier remote access
Remote access is a frequent attack route, so it is centralised, strongly authenticated and logged session by session.
Compensate when you can’t patch
Where systems cannot be updated, segmentation, allow-listing and monitoring reduce the risk instead.
Bridge IT and OT teams
Shared governance and incident routines bring automation engineers and IT security to the same table.
Outcomes
What you get
- A complete inventory of OT assets and connections
- A risk assessment aligned with IEC 62443
- A segmented network with defined zones and conduits
- Secure, logged remote access for suppliers
- Continuous OT monitoring integrated with your SOC
- A product security process for connected products
AI-powered
Unleash the power of AI
We offer the possibility of using AI throughout this work: ready-to-use AI tools, or a customised version built for your organisation that can run inside your own infrastructure. In OT and IoT security, AI learns the normal behaviour of machines and industrial protocols so that deviations such as unexpected commands or new connections stand out, and helps engineers interpret alerts in the context of the production process.
Starter offer
OT Security Baseline
A fixed-scope, four-week assessment of one production site that maps your OT assets and connections, rates the risks and gives you a segmentation and protection plan.
Week 1
Prepare
Kick-off with operations, IT and safety, review of network drawings, and installation of passive monitoring at agreed points.
Week 2
Observe
Passive capture of OT traffic to build an asset inventory and identify connections, protocols and remote access paths.
Week 3
Assess
Site walk-through and interviews, with risks assessed against IEC 62443 and your NIS2 obligations.
Week 4
Plan
Findings, a segmentation design and a prioritised roadmap presented to site and IT management.
You receive
- An inventory of OT assets, connections and remote access paths
- A risk assessment against IEC 62443
- A segmentation and remote-access design
- A prioritised roadmap that fits your maintenance windows
FAQ
Frequently asked questions
Will the assessment disrupt production?
No. We use passive monitoring that only listens to network traffic, and any on-site work is planned with your operations team. Active testing is done only where agreed, preferably on test equipment or during planned stops.
How long does it take to secure an OT environment?
A baseline assessment of one site typically takes three to five weeks. Implementing segmentation and monitoring usually runs over several months and follows your maintenance and shutdown schedule.
Our machine suppliers need remote access. Can we keep that?
Yes. We replace ad-hoc connections with a controlled remote-access solution where suppliers authenticate strongly, reach only their own equipment and every session is logged. Suppliers keep supporting you, and you keep control.
How do you work with our automation suppliers and integrators?
Altechy acts as your single point of contact and brings OT security specialists from our partner network who work alongside your automation suppliers, integrators and IT team. Changes to control systems are always coordinated with the people who know them best.
Related services
IoT & Connected Systems Security Operations (SOC & MDR) Security Strategy, Risk & Compliance Network & Connectivity Engineering & Manufacturing Platforms Incident Response & Cyber Recovery
Let’s secure your operations
Book a free 60-minute idea session. We explore your challenges and opportunities with you, and suggest where to start — with no obligation.