OPC Studio User's Guide and Reference
Examples - Server OPC UA - Specify additional host name

.NET

// This example shows how to specify additional host name(s) for the server. This is useful when the server is running on a 
// computer that has multiple host names, and you want to make the server accessible under them.
// You can use any OPC UA client, including our Connectivity Explorer and OpcCmd utility, to connect to the server. 
//
// Find all latest examples here: https://opclabs.doc-that.com/files/onlinedocs/OPCLabs-OpcStudio/Latest/examples.html .
// OPC client, server and subscriber examples in C# on GitHub: https://github.com/OPCLabs/Examples-OPCStudio-CSharp .
// Missing some example? Ask us for it on our Online Forums, https://www.opclabs.com/forum/index ! You do not have to own
// a commercial license in order to use Online Forums, and we reply to every post.

using System;
using OpcLabs.EasyOpc.UA;
using OpcLabs.EasyOpc.UA.Application;
using OpcLabs.EasyOpc.UA.Application.Extensions;
using OpcLabs.EasyOpc.UA.NodeSpace;
using OpcLabs.EasyOpc.UA.OperationModel;

namespace UAServerDocExamples._EasyUAServer
{
    class AlternateHostNames
    {
        public static void Main1()
        {
            // Obtain the application interface.
            EasyUAApplication application = EasyUAApplication.Instance;

            // Remove the own application certificate. This assures that, when needed, the server will create a new one with
            // the parameters we want and specify.
            try
            {
                Console.WriteLine("Removing the own application certificate...");
                application.RemoveOwnCertificate();
                Console.WriteLine("The application certificate has been removed.");
            }
            catch (UAException uaException)
            {
                Console.WriteLine("*** Failure: {0}", uaException.GetBaseException().Message);
            }

            // Instantiate the server object.
            // By default, the server will run on endpoint URL "opc.tcp://localhost:48040/".
            var server = new EasyUAServer();

            // Add an alternate host name to the server (and its application certificate).
            server.AlternateHostNames.Add("mycomputer.mycompany.example");

            //
            
            // Define a data variable providing random integers.
            var random = new Random();
            server.Add(new UADataVariable("MyDataVariable").ReadValueFunction(() => random.Next()));

            // Start the server.
            Console.WriteLine("The server is starting...");
            server.Start();

            Console.WriteLine("The server is started.");
            Console.WriteLine();

            // Let the user decide when to stop.
            Console.WriteLine("Press Enter to stop the server...");
            Console.ReadLine();

            // Stop the server.
            Console.WriteLine("The server is stopping...");
            server.Stop();

            Console.WriteLine("The server is stopped.");
        }
    }
}
' This example shows how to specify additional host name(s) for the server. This is useful when the server is running on a 
' computer that has multiple host names, and you want to make the server accessible under them.
' You can use any OPC UA client, including our Connectivity Explorer and OpcCmd utility, to connect to the server. 
'
' Find all latest examples here: https://opclabs.doc-that.com/files/onlinedocs/OPCLabs-OpcStudio/Latest/examples.html .
' OPC client and subscriber examples in VB.NET on GitHub: https://github.com/OPCLabs/Examples-QuickOPC-VBNET .
' Missing some example? Ask us for it on our Online Forums, https://www.opclabs.com/forum/index ! You do not have to own
' a commercial license in order to use Online Forums, and we reply to every post.

Imports System
Imports OpcLabs.EasyOpc.UA
Imports OpcLabs.EasyOpc.UA.Application
Imports OpcLabs.EasyOpc.UA.Application.Extensions
Imports OpcLabs.EasyOpc.UA.NodeSpace
Imports OpcLabs.EasyOpc.UA.OperationModel

Namespace _EasyUAServer
    Partial Friend Class AlternateHostNames
        Shared Sub Main1()
            ' Obtain the application interface.
            Dim Application As EasyUAApplication = EasyUAApplication.Instance

            ' Remove the own application certificate. This assures that, when needed, the server will create a new one with
            ' the parameters we want and specify.
            Try
                Console.WriteLine("Removing the own application certificate...")
                Application.RemoveOwnCertificate()
                Console.WriteLine("The application certificate has been removed.")
            Catch uaException As UAException
                Console.WriteLine("*** Failure: {0}", uaException.GetBaseException().Message)
            End Try

            ' Instantiate the server object.
            ' By default, the server will run on endpoint URL "opc.tcp://localhost:48040/".
            Dim server = New EasyUAServer()

            ' Add an alternate host name to the server (and its application certificate).
            server.AlternateHostNames.Add("mycomputer.mycompany.example")

            '

            ' Define a data variable providing random integers.
            Dim random = New Random()
            server.Add(New UADataVariable("MyDataVariable").ReadValueFunction(Function() random.Next()))

            ' Start the server.
            Console.WriteLine("The server is starting...")
            server.Start()

            Console.WriteLine("The server is started.")
            Console.WriteLine()

            ' Let the user decide when to stop.
            Console.WriteLine("Press Enter to stop the server...")
            Console.ReadLine()

            ' Stop the server.
            Console.WriteLine("The server is stopping...")
            server.Stop()

            Console.WriteLine("The server is stopped.")
        End Sub
    End Class
End Namespace
See Also

Fundamentals