What you did is fine for development - but insecure.

Secure way would be to place a copy of the (public part of the) server certificate into the proper certificate store (a directory on the disk, usually) so that the client can verify that it is connecting to the right server.

More info:

opclabs.doc-that.com/files/onlinedocs/OPCLabs-OpcStudio/Late...%20Instance%20Certificate.html

Many times, this just means copying the file from "rejected" to "trusted" store.

Regards

I was able to access the node but I got "Certificate Not Validated" popup. I bypass it by setting AcceptAnyCertificate=true. Is this the correct way or do I need to set anything else if I don't need to apply certificate at this stage?

EasyUAClient.SharedParameters.EngineParameters.CertificateAcceptancePolicy = new OpcLabs.EasyOpc.UA.Engine.UACertificateAcceptancePolicy()
{
    AcceptAnyCertificate = true
};
var client = new EasyUAClient();

 

Attached is Server settings from UaExpert
 

That's not the right way to specify username and password.

For the correct example, see e.g. here:  opclabs.doc-that.com/files/onlinedocs/OPCLabs-OpcStudio/Late...ind%20all%20registrations.html



More about it:  opclabs.doc-that.com/files/onlinedocs/OPCLabs-OpcStudio/Late...Authentication%20(Client).html  

Regards

Yes, I used same username and password I used in UaExpert as shown below but still get BadUserAccessDenied. Can it be that I need to specify anything in addition to username and password?

 new UAReadArguments(new UAEndpointDescriptor(serverUrl) { UserName="user", Password="password" }, new UANodeDescriptor("ns=2;s=/Channel/Spindle/actSpeed[u1,1]"))


 

If you get BadUserAccessDenied: Now you have the right node probably. Did you use user authentication (username/password, for example) in uaExpert? If so you would have to do a corresponding thing in your code.
 

I did use ns=2 intentionally. It is because UaExpert displayed the node with "NS2|..." in Data Access View which is their syntax (in that view only!) for the same thing.

ns=0 (namespace zero) is reserved for nodes defined by OPC Foundation. Your node is *not* in that namespace, In your image, an incorrect node is selected. You are looking at the Root node, not your node. You need to select (click on) your node in the left part of the screen, under Address Space (NOT under Data Access View). THEN you will see the right NodeId under Attributes.

Regards
 

I had a type in previous reply so I corrected it here:

Did you use "ns=2" as an example? It's just that according to the attached image the namespace is 0. So I did try `ns=2;s=/Channel/Spindle/actSpeed[u1,1]`, but now I get  BadUserAccessDenied for StatusCode. If I do use ns=0 (`ns=0;s=/Channel/Spindle/actSpeed[u1,1]`) I get BadNodeIdUnknown

Did you use "ns=2" as an example? It's just that according to the attached image the namespace is 0. So I did try `ns=2;s=/Channel/Spindle/actSpeed[u1,1]`, but now I get  BadUserAccessDenied for StatusCode. If I do use ns=0 (`ns=2;s=/Channel/Spindle/actSpeed[u1,1]`) I get BadNodeIdUnknown

If you want to specify it as a string in QuickOPC, you can use "ns=2;s=/Channel/Spindle/actSpeed[u1,1]".

UaExpert will actually show the same to you if the select that node in the left pane (Address Space) and then inspect its NodeId attribute in the right pane (Attributes).

I hope this helps
Best regards