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OPC Foundation UA .Net Standard Library Reference Server

Introduction

This OPC Server is designed to be default OPC UA Server when opening the OPC UA Compliance Test Tool and uses an address-space that matches the design of the UACTT.

It is built with the Quickstart application template (OPC Server) and uses the OPC Foundation UA .NET Standard Library SDK. Therefore it supports the opc.tcp and http transports. There is a .Net 4.6.1 based server with UI and a console version of the server which runs on any OS supporting .NET Standard Library.

How to build and run the Windows OPC UA Reference Server with UACTT

  1. Open the solution UA Reference.sln with VisualStudio.
  2. Choose the project Reference server in the Solution Explorer and set it with a right click as Startup Project.
  3. Hit F5 to build and execute the sample.

How to build and run the console OPC UA Reference Server on Windows, Linux and iOS

This section describes how to run the ConsoleReferenceServer.

Please follow instructions in this article to setup the dotnet command line environment for your platform.

Start the server

  1. Open a command prompt.
  2. Now navigate to the folder SampleApplications/Workshop/Reference/ConsoleReferenceServer.
  3. Execute dotnet restore. This command calls into NuGet to restore the tree of dependencies.
  4. To run the server sample type dotnet run. The server is now running and waiting for the connection of the UACTT.

UACTT test certificates

The reference server always rejects new client certificates and requires a few UACTT certificates in approbriate folders. The console server certificates are stored in OPC Foundation/CertificateStores while the Windows .Net 4.6 server stores the certificates in %CommonApplicationData%\OPC Foundation\CertificateStores. %CommonApplicationData% maps to the path set by the environment variable ProgramData on Windows.

Certificate stores

Under CertificateStores, the following stores contain certificates under certs, CRLs under crl or private keys under private.

  • MachineDefault contains the reference server public certificate and private key.
  • RejectedCertificates contains the rejected client certificates. To trust a client certificate, copy the rejected certificate to the UA Applications/certs folder.
  • UA Applications contains trusted client and CAs certificates and CRLs.
  • UA Certificate Authorities contains CAs certificates and CRLs needed for validation.

Placing the UACTT certificates

Copy the certificates for testing with the UACTT to the following stores:

  • UA Applications/certs: expired.der, notyetvalid.der, opcuactt.der, opcuactt_incorrectappuri.der, opcuactt_incorrectip.der, opcuactt_incorrectsign.der, opcuactt_revoked.der, opcuser.der, opcuser_incorrectsign.der, opcuser_revoked.der, opcuser-expired.der, opcuser-notyetvalid.der, opcuactt_ca.der
  • UA Applications/crl: revocation_list_opcuactt_ca.crl

UACTT Testing

Download and install the OPC UA Compliance Test Tool.

Note: Access to the UACTT is granted to OPC Foundation Corporate Members.

UACTT sample configuration

A sample configuration for the UACTT Version 1.03.340.358 can be found in UAReferenceServer.ctt.xml. The reference server is tested against the Standard UA Server profile, the Method Server Facet and the DataAccess server Facet. It is recommended to run the server as retail build with disabled logging, to avoid side effects due to timing artifacts when log entries are written to a disk drive.

Finding the Address Space Configuration Code

  • Project: Reference Server
  • File: ReferenceNodeManager.cs
  • Method: CreateAddressSpace

Finding the UA Services

  • Project: Opc.Ua.Server
  • File: StandardServer.cs