OT Network Segmentation Without VLANs
Achieve true OT network segmentation using identity-based overlay networking instead of VLAN restructuring. Production networks stay untouched; zero-trust enforcement happens at the proxy layer.
Zuletzt aktualisiert:
Traditional segmentation means re-cutting VLANs, re-IPing assets, and touching switch configuration across the plant, which is slow, risky, and often stalls. Access Gate segments the OT network a different way: an identity-based overlay enforces who can reach what at the proxy layer, while the underlying VLANs and IP addressing stay exactly as they are.
The result is true least-privilege segmentation, down to a single asset, without a VLAN redesign or a production outage. Each machine can sit in its own segment, and the rules follow identity rather than network location, so moving or adding an asset does not mean re-cutting the network.
What this video covers
- Why VLAN-based segmentation stalls in brownfield OT
- How identity-based overlay segmentation works at the proxy layer
- Achieving per-asset least privilege without a VLAN redesign or re-IPing
- Why rules follow identity, not network location
Protocol and vendor coverage
Segmentation is enforced at the proxy, so it understands the industrial protocols it governs rather than just addresses and ports. Access Gate covers every industrial protocol and every vendor: Modbus and Modbus TCP, DNP3, OPC UA, EtherNet/IP, PROFINET, Siemens S7, IEC 61850, and MQTT, across 50+ OT and ICS vendors such as Siemens, Rockwell Automation, Schneider Electric, Mitsubishi Electric, and Beckhoff.
Irish Manufacturing Research segmented brownfield OT with an overlay and zero changes to the underlying network.
- 0 underlay changes: no VLAN re-cut, no re-IPing of production assets
- 5 protocols proven at the workflow level: Modbus TCP, OPC UA, MQTT, web, and RDP
- One evidence base mapped to NIS2, IEC 62443, and ISO/IEC 27001
Questions and answers
Can I segment OT without changing VLANs?
Yes. Access Gate enforces segmentation with an identity-based overlay at the proxy layer, so VLANs and IP addressing stay unchanged. You get per-asset least privilege without re-cutting the network.
Is overlay segmentation really least privilege?
Yes. Access follows identity and is scoped per asset and protocol, so a device reaches only what it is authorized to, down to a single asset, rather than everything in its VLAN.
What happens when I add or move an asset?
Because rules follow identity rather than network location, adding or moving an asset does not require re-cutting VLANs or re-IPing. You enroll it and its policy applies.
Product Capabilities
See Access Gate in Your Environment.
The demos show the pattern. A live call shows what it looks like on your network — with your PLCs, your historian, your constraints.