What a realistic OT security baseline looks like
You do not need to air-gap the plant. You need an inventory, a traffic baseline and a change process people actually follow.
30 June 20267 min read
Most operational networks are more documented than teams assume and less controlled than auditors hope. A passive sensor placed on a mirrored port usually reveals devices nobody remembered installing.
Start with inventory, then baseline normal control traffic per zone. Change alerts are only useful once the baseline is stable, and the process around them matters more than the tool.
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