Securing an Industrial Network Without Disrupting Production

The challenge

Production equipment and engineering systems depended on stable connectivity, while vendors occasionally required remote access for support. The plant could not tolerate security changes that interrupted operations, yet unrestricted connectivity created growing cyber risk.

Our approach

Astek began with passive discovery and operational discussions before introducing controls. Changes were sequenced around production requirements, with strict attention to known device communication and vendor-support workflows.

What Astek implemented

• Mapped critical OT assets, engineering stations and required communication paths.
• Separated industrial systems from general corporate and guest networks.
• Controlled traffic crossing between IT and OT zones through defined firewall rules.
• Replaced informal vendor access with approved, time-bound remote connectivity.
• Added monitoring around key gateways without altering production-device behaviour.

Business outcome

The plant improved separation and control around industrial systems while preserving operational continuity. Remote support became more accountable, and future security improvements could be introduced against a documented OT architecture.