OT Security
OT and Industrial Network Security Design
Production networks were built to run machines, not to resist attackers. Many were installed flat, with default credentials and no separation from the business network. That worked when they were isolated. Few are isolated anymore.
What we do
Security That Does Not Stop the Line
OT is not IT. Patch windows are rare, uptime comes first, and equipment often outlives the vendor that made it. Every project is designed around those constraints.
Segmentation Design and Build
Separating production from the business network so a compromised office workstation cannot reach a PLC or HMI. One of the most effective controls available in an OT environment.
Asset Inventory
You cannot protect equipment nobody has listed. We identify what is on the production network, including devices added years ago and never documented.
Secure Remote Access Design
Vendors need access to their equipment. We replace shared credentials and always-on remote tools with brokered, logged, time-limited access you control and can revoke.
Legacy System Protection
Equipment on unsupported operating systems that cannot be patched or replaced without a capital project gets isolated and wrapped in compensating controls.
Passive Monitoring Design
Sensors that watch industrial protocol traffic without injecting anything onto the production network, selected, placed and tuned, then handed to your team or the provider you choose.
Standards Alignment
Practical alignment with IEC 62443 and CISA guidance, scoped to what a mid-sized operation can implement and keep up.
How an OT Project Runs
Nothing touches the production network until we understand it. Passive first.
Passive Discovery
We map the production network without active scanning. Active scans have knocked industrial equipment offline before, and we will not take that risk on a live line.
Risk Review and Design
Findings ranked by operational impact, then a segmentation and access design you approve before any change.
Segment, Harden, Document
Changes staged into planned maintenance windows with rollback ready at every step, then as-built drawings and runbooks handed over.
Is Your Production Network Actually Separated?
Many owners believe theirs is. An assessment establishes what is really true, without scanning a single device.
FAQ
OT Security Questions We Get Asked
Discovery is passive: we watch traffic through a mirror port or network tap and do not run active scans against production devices. Setting up the mirror port or tap is scheduled with you, in a maintenance window if needed.
Worth verifying rather than assuming. True air gaps are rare and tend to erode: a vendor laptop, a remote support tool, a shared jump box, a USB drive, or one switch uplink someone added for convenience.
No, it makes patching the wrong primary control. Unpatchable equipment is normal in OT. The answer is compensating controls: segmentation so it is unreachable, restrictions on what it can talk to, and monitoring of what it does.
Manufacturing, logistics, warehousing and distribution, where modern and decades-old equipment often share a network never designed with security in mind.
Your team or a provider you choose. We place and tune the sensors, write the alert runbook and walk the responders through it.
If your insurer asks about OT segmentation, documented separation between production and business networks gives you a clear answer.
