Secure & Reliable OPC Tunneling

Kepware's OPC tunneling solution uses a client/server architecture for secure and reliable real-time data tunneling through firewalls and across the internet, WAN, or LAN. It allows for easy remote communications between devices, data sources, and applications by eliminating the reliance on Microsoft COM and DCOM technology.

Kepware's OPC tunneling solution includes the KEPServerEX® connectivity platform with the OPC UA Client driver.

The OPC Unified Architecture (UA) open standard is used to provide an ideal tunnel for device communications between two instances of KEPServerEX: one instance that functions as the tunnel client and another instance that functions as the tunnel server. The OPC UA Client driver pairs with the UA Server interface of a KEPServerEX implementation to transfer data securely and reliably.

Features & Benefits

Using the OPC tunneling solution offers the following benefits:

  • Easier setup and configuration than DCOM
  • Firewall-friendly
  • Robust portfolio of client interfaces and devices
  • Secure and reliable data transfer using 256-bit AES message signing and encryption
  • Multi-threaded architecture and non-blocking asynchronous messaging for performance, scalability, and reliability
  • Easy troubleshooting through diagnostic tools
For a more detailed diagram of Kepware's OPC tunneling solution, please click here.

Kepware's OPC tunneling solution was evaluated by an industry consortium consisting of the five Oil & Gas SuperMajors and the Department of Homeland Security in October 2015. To request a report of their findings, please email

Learn More

Download the Secure Data Tunneling guide for KEPServerEX. If you'd like to learn more about Kepware's OPC tunneling solution, simply fill out the form or email

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