OT cybersecurity architecture, secure by design
A defensible OT security architecture is built, not bolted on. Synapse lets you model the whole site, apply a zone-and-conduit design, and prove it meets IEC 62443 — at design time, when changes are still cheap.
Architecture as a structured, checkable model
Most OT architectures live in Visio and a spreadsheet, so they drift the moment the site changes. Synapse treats assets, flows, zones and conduits as first-class data — a living model that powers the segmentation checks, the compliance report and the as-designed record from one source.
- DMZ, firewalls, secure remote access and authentication as modelled controls
- Defence in depth expressed as zones, conduits and target security levels (SL-T)
- Deterministic checks that re-run any time with identical results
Catch the gaps before commissioning
Cross-zone flows with no conduit, a missing DMZ, a flat network that spans security zones, an unassigned SL-T — Synapse surfaces these inline as you design, then generates the prioritised gap list and the zone/conduit diagram your asset owner signs off.
Designed for the credential that gets given away
Awareness training changes how often someone is phished. It never gets that number to zero, and the architecture is the control that has to hold on the day it happens. Defence in depth is what decides the difference: a stolen vendor credential should buy an authenticated session on a DMZ broker under MFA and session recording, not a route into plant control.
- Untrusted access brokered through a DMZ, never terminated in the control zone
- Least-privilege conduits — one explicit rule per permitted flow, default-deny for everything else
- Session timeouts and recording, so a compromised session is bounded and reviewable
Frequently asked questions
What is an OT cybersecurity architecture?+
It is the structured design of an operational-technology network's security: how assets are grouped into zones, how those zones communicate through controlled conduits, and what security level each must meet. A good architecture makes the segmentation, trust boundaries and controls explicit and auditable.
How is OT security architecture different from IT?+
OT prioritises availability and safety over confidentiality, runs long-lived devices that can't always be patched, and carries deterministic real-time protocols (IEC 61850 GOOSE, DNP3, Modbus). Architecture leans on segmentation, conduits and compensating controls rather than constant patching.
How does secure-by-design reduce cost?+
Fixing a segmentation flaw in the design is far cheaper than re-architecting a commissioned plant. Validating the architecture against IEC 62443 before build removes rework, change orders and audit findings later.
Can architecture defend against social engineering?+
Not against the phish itself, but against what the phish is worth. If a compromised vendor account only reaches a DMZ broker that still demands a second factor, records the session, and can cross into OT only through a scoped conduit, a successful social-engineering attack buys the attacker very little. That outcome is decided at design time, long before the email arrives.
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