OT security lab · Level 6 of 8
Patch or protect: choose within the maintenance window
Level 6 of 8 in the OT security lab: a free OT security exercise at Advanced level. Seven weaknesses, one short maintenance window and a small budget. Patch what you can, protect what you cannot, and bring the residual risk under the target.
Free · no download. Your work is saved on this device. Updated 18 Oct 2026.
The brief
- Client
- Pellam Chemical Blending
- Site
- Blend hall, Pellam
- Work order
- WO-OTS-106
- Task code
- OTS-06
- Difficulty
- Advanced
- Type of work
- Planning
Seven weaknesses, one short maintenance window and a small budget. Patch what you can, protect what you cannot, and bring the residual risk under the target.
Skills you practise
- Patch versus compensating control
- Risk, downtime and cost
- Maintenance windows
- Safety systems and change
What the test checks
The acceptance test marks the skills this level practises.
- Patch versus compensating control
- Risk, downtime and cost
- Maintenance windows
- Safety systems and change
In this lab
- Purdue levels, zones and conduits
- Firewall rules, remote access and logs
- Patch plans, backups and an incident drill
Levels in the OT security lab
Previous: Spot the intruder: the events that matter in a day's logNext: Backup and recovery: known-good copies and a proved restore
- Map the plant network: put every device on its level
- Zones and conduits: split a flat network
- Firewall rules: the minimum, then deny by default
- Remote access: the vendor comes in through the DMZ
- Spot the intruder: the events that matter in a day's log
- Patch or protect: choose within the maintenance window
- Backup and recovery: known-good copies and a proved restore
- Incident drill: a simulated note on an operator screen
Part of the OT security lab
Map a plant network, split it into zones, write the firewall rules, read the logs and run the response drill.
Feeds these internships: SCADA and HMI.