OT & IoTOT Network Security
We redesign operational networks into zones with controlled conduits, build an industrial DMZ between IT and OT, secure vendor remote access and monitor traffic passively, so one compromised system cannot take down the plant.
01Overview
OT network segmentation divides an industrial network into zones, groups of assets with similar security needs, and controls the conduits between them with firewalls and rules, so that a problem in one area, or an attacker from the business network, cannot spread to the systems that run the process.
Many plants still run flat networks, where a laptop connected to a switch can reach every controller. Segmentation is the single most effective improvement most plants can make.
The design must respect real-time traffic, legacy protocols and safety, which is why we plan it with operations and implement it in stages.
02What we do
From design to monitoring.
Group assets by function and risk, define allowed flows and set target security levels.
You receive: A network design the plant team can approve.
A controlled exchange layer between IT and OT.
Firewalls that understand industrial protocols and commands.
Vendor and engineer access without direct network exposure.
Detect new devices, abnormal commands and policy violations.
Prove that the segmentation works.
03How we work
Segment in the order that reduces risk soonest.
Step 1 · Weeks 1 to 4
Map assets and flows passively.
Step 2 · Weeks 4 to 6
Zones, conduits and DMZ.
Step 3 · Weeks 6 to 8
Segment one area in a window.
Step 4 · Months 3 to 9
Extend across sites.
Step 5 · Each stage
Test rules and alerts.
Step 6 · Ongoing
Ongoing detection.
04Reference
A simple guide to common boundaries.
| Boundary | Control | Notes |
|---|---|---|
| IT to OT | Industrial DMZ with firewalls and jump hosts | No direct sessions across |
| Site to site | Encrypted, authenticated conduits | Only required protocols |
| Level 3 to Level 2 | Firewall with protocol inspection | Allow-list of commands where possible |
| Safety systems | Strong isolation or one-way links | Highest protection |
| Vendor access | Brokered session with MFA and recording | Time-limited |
05Technology
Industrial and enterprise security tools.
Firewalls and access
Industrial ecosystems
Monitoring
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06Saudi Arabia and the GCC
Segmentation is a recurring requirement.
Network segmentation, secure remote access and monitoring are expected for critical OT, with stronger controls for more critical facilities.
Critical systems need isolation and restricted access.
Vendor and contractor access is a focus of audits and incidents.
07Why GoAgile
We are network engineers first.
We design and run enterprise and industrial networks.
Staged changes in agreed windows.
Rules proven by testing.
OT alerts reach analysts.
Cabling, switching and security together.
Both languages on site.
Credentials
08Clients
Organisations in regulated sectors choose GoAgile because security is delivered by the team that also builds and runs their infrastructure.
Tier-1 Saudi bank
Banking
National energy operator
Oil, gas and power
Government authority
Public sector
Regional telecom operator
Telecommunications
Healthcare group
Hospitals and clinics
Retail and e-commerce group
Retail
Ports and logistics operator
Logistics
Insurance company
Insurance
Fintech and payments provider
Financial technology
Industrial manufacturer
Manufacturing
Plant networks had grown without a clear map, and remote access for vendors was a concern.
Result: A mapped, segmented network with a prioritised remediation plan the plant team could schedule.
A manufacturer was rolling out connected devices and needed to know the design was safe.
Result: Design changes made before mass rollout.
The bank needed evidence that its people, processes and detection would hold up against a realistic attacker, in line with SAMA expectations.
Result: Detection gaps were fixed, playbooks were updated and the board received a plain-language report.
Client names are withheld for confidentiality.
09Related services
Each service stands alone and works better with the others.
Tell us about your plant network. We will propose a staged segmentation plan.
Plan OT segmentation10Questions answered
Tell us about your environment and what you need. We will respond with a scoped proposal, not a brochure.
Specialists who do this work every week, reporting in Arabic and English.