Yesway Communications
IEC 62443 Wireless Audit | OT Radio Security | Yesway
What Is an IEC 62443 Wireless Audit?
An IEC 62443 wireless audit is a structured assessment of the wireless and radio systems on an industrial site, checked against the IEC 62443 standard for operational technology (OT) security.
It measures how those systems are secured, kept separate from critical equipment, and monitored — and flags where they fall short of the standard.
That is the short answer. Here is what it means in practice.
What IEC 62443 actually says about wireless
IEC 62443 is the international standard for securing industrial control systems — the equipment that runs factories, utilities, and plant.
It does not treat wireless as an afterthought.
It names it directly.
- Wireless use control (SR 2.2): you must control which wireless devices are allowed to connect.
- Unauthorised wireless detection (SR 2.2 RE 1): you must spot and report rogue devices.
- Wireless access management (NDR 1.6): every wireless link needs strong authentication, encryption, and monitoring.
In plain terms: every radio path into your site is a door. The standard says you have to know about every door.
What a wireless audit covers
A proper audit looks at the things a desk-based review cannot see.
- Every wireless and radio system on site — Wi-Fi, two-way radio, DMR (digital mobile radio), telemetry, and IIoT (industrial internet-of-things) sensors.
- The radio frequencies actually in use, measured on site — not assumed from paperwork.
- Whether wireless sits in its own protected zone, away from critical control systems.
- Rogue or forgotten devices still transmitting.
- How each link is authenticated, encrypted, and logged.
Who needs one?
If you run an industrial site with any wireless in the OT environment, this applies to you.
Manufacturing. Energy. Utilities. Water. Oil and gas. Critical infrastructure.
If you are working toward IEC 62443 compliance, the wireless layer is already part of the scope — whether your current auditor has looked at it or not.
Why wireless is the gap
Here is the problem.
Most OT security audits are run by IT and cyber specialists.
They are excellent at networks, firewalls, and servers.
But radio is a different discipline. It needs someone who can pick up a spectrum analyser and read what is actually in the air.
So the wireless conduits get ticked off on paper — or skipped altogether.
That is the gap. And it is the one an attacker reaches first, because radio does not stop at the fence.
How Yesway approaches it
Yesway is a radio and RF (radio frequency) engineering firm first, and an IEC 62443 practice second.
That order matters.
We survey the site, measure the spectrum, and map every wireless conduit against the standard — then hand you a clear report of what passes, what fails, and what to do next.
No jargon. No box-shifting. Just the wireless half of IEC 62443 done properly.
Scoping review — £1,750, credited in full against a commissioned assessment. Site assessments from £8,500.
Request a scoping review ?
— Craig