OT cyber discussions often stall between “air gap everything” and “patch Windows monthly on the HMI.” TECHNLOGIX PTY LTD advocates baseline hygiene achievable in Victorian factories: know what is connected, control remote access, backup images offline, and test restore.
Baseline practices
- Unique passwords on engineering ports; no shared vendor defaults left in place.
- USB policy for maintenance laptops—scan or dedicated OT machines.
- Documented vendor remote access with time limits and session logs.
- Gold images for PLC/HMI before and after any download.
What we coordinate with IT
Firewall rules, jump hosts, and antivirus exceptions where required. We do not unilaterally open ports; change records go through your process.
Limitations
We are controls engineers, not a managed SOC. Serious threat models need specialist partners—we integrate their requirements into network and access design.