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WPROIT WPROIT

Energy

Modernising perimeter defence across 14 substations for a Dutch grid operator

NL Helios Energy NV

Outcome metrics

14

Sites unified

0

Audit findings on perimeter

< 15 min

Migration downtime per site

1 The challenge

Aging firewalls across 14 distributed substations had divergent rule sets, no central change control, and inconsistent IDS coverage — a structural risk for an OT-adjacent network.

2 Our approach

WPROIT's NSE-certified team rolled out a unified FortiGate fabric with a golden-config baseline, central policy management, and a phased migration plan that preserved operational continuity at each substation.

3 Outcome

All 14 sites are now under a single policy plane with unified IDS/IPS coverage; quarterly audit findings on perimeter consistency dropped to zero.

"A genuinely zero-surprise migration. The phased plan let us keep production running while we modernised every site."

OT Security Lead Helios Energy NV

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