Visibility Without Production Impact
As your OT footprint grows and IT ties into it, get passive, real-time visibility across IT and OT environments. No scanning, no agents, no production impact.
Trusted by leading companies
| IP Address | Name | Type | Traffic |
|---|---|---|---|
| 172.31.115.246 | Admin Access HTTP | ASSET | 500.43Mb |
| 172.31.112.2 | Temperature Sensor | ASSET | 250.36Mb |
| 10.0.4.18 | PLC Controller #3 | OT | 84.12Mb |
You cannot secure what you cannot see.
Most OT operators cannot produce an accurate, current list of what is on their network. Devices were installed over decades by different integrators, spreadsheets go stale the moment they are saved, and the network quietly accumulates assets with mixed ownership.
The usual way to build one, active scanning, is the one thing OT cannot tolerate. Probing a sensitive PLC or RTU can crash it, and a vulnerability scanner sweeping a control network generates exactly the kind of unexpected traffic that trips safety systems.
Passive observation of the traffic that already crosses the network reveals every device that communicates, what it talks to, and over which protocol, with no packets sent and nothing installed. Visibility becomes a byproduct of the network running normally.
Safe, Accurate Visibility. Without Risking Operations
Trout Access Gate delivers real-time insight into networks through passive observation. Accurate visibility you can trust from day one.
Passive Network Monitoring
Observe traffic without touching endpoints or disrupting operations.
NetFlow & PCAP Ingestion
Natively ingest existing telemetry from taps, routers, or collectors.
Automatic Discovery
Identify devices, roles, and communication patterns instantly.
Protocol Identification
Decode IT and OT protocols to understand real system behavior.
Flow Direction Mapping
Visualize who talks to whom, including east-west industrial traffic.
WASM Processing Engine
Scalable, edge-native analytics to process data without added infrastructure.
Visibility in minutes, with no production impact.
Observe, with zero footprint.
Point existing NetFlow or a tap at Access Gate. It begins building the asset map and flow graph immediately, with no agents, no probes, and no traffic added to the OT network.
Turn visibility into control.
The discovered inventory and flows become the basis for zones, conduits, and identity-based access policy, so the map you built passively turns directly into segmentation and least-privilege access with continuity.
Asset identification for NIST, NIS2, and IEC 62443.
An accurate inventory is the foundation auditors start from. Passive discovery maps onto NIST 800-171 Configuration Management (CM) controls required for CMMC, NIS2 Article 21 asset identification and risk management, and the IEC 62443 requirement to know your zones and the assets in them before you can defend them.
Because the inventory is continuous and derived from live traffic, the evidence is always current. Reports export on demand, and a REST API feeds the same data to your SIEM or CMDB, so asset identification is a live capability rather than an annual spreadsheet exercise.
Access Gate secures your assets first, then exposes the simple services your teams and vendors actually want, so they run through the sanctioned path, not around it.
OT runs through you, not around you.
Questions and Answers
Active probes sent to your OT network. The Access Gate operates entirely from passive NetFlow analysis, no scanning, no agents, no disruption.
No. The Access Gate operates passively by analyzing NetFlow data from your existing switches and routers. It never sends probes, installs agents, or generates traffic on your OT network. Deployment is non-intrusive and requires no downtime.
Yes. Because the Access Gate works from network telemetry rather than device interrogation, it identifies any device that communicates on the network, including legacy PLCs, old HMIs, and proprietary industrial equipment that can't run agents or respond to SNMP.
Vulnerability scanners actively probe devices, which can crash sensitive OT equipment and generates significant network noise. The Access Gate takes the opposite approach: it passively observes traffic patterns to build an inventory without ever touching a single device. You get accurate visibility without the risk.
The asset inventory maps directly to NIST 800-171 Configuration Management (CM) controls required for CMMC, NIS2 Article 21 asset identification, and IEC 62443 zone and conduit models. Reports can be exported on demand for auditors.
Yes. The Access Gate provides a REST API for exporting inventory data in JSON or CSV format. You can integrate with ServiceNow, Splunk, QRadar, or any platform that accepts structured asset data.
Active scanners send probes to devices to interrogate them, which can crash sensitive OT equipment and floods the control network with unexpected traffic. Access Gate does the opposite: it observes the NetFlow and PCAP the network already produces, so it identifies every communicating device, including legacy and proprietary gear, without sending a single packet to a field device or installing anything.
Download the Access Gate Datasheet.
Get the complete product overview with technical capabilities, deployment model, compliance alignment, and customer references.
What's Inside
Product architecture, deployment model, key capabilities (proxy enforcement, micro-DMZs, identity-based access), compliance alignment, and real-world customer deployments.
See It in Action
Request a live demo to see how the Access Gate deploys on your network without rewiring or downtime.