OPC-UA Client connected to remote OPC-UA Server

[Nathanael]

Hello Community,

Our customer is struggling in performing OPC-UA communication between a CtrlX Core as client and a remote CtrlX Core as server. 'Remote' means server can be accessed on a different remote network by internet.

The use of UA Expert leads to a successful communication whereas unsuccessful with CtrlX Core Client.

Unfortunately there is no accurate info regarding this error code.

I also tried on my side with both 1.20 and 2.6.3 versions but unsuccessful as well.
However connection to remote Ip is successful:

Any hints from would be appreciable.

[Sgilk]

Hello @Nathanael ,

Have you trusted the certificate for the ctrlX CORE OPC UA Client on the ctrlX CORE hosting the OPC UA Server?

EX:

[Nathanael]

Hello Sgilk,

Unfortunately the needed certificate is not added on Server side when Client is a CtrlX Core.
However if Client is UA Expert, the needed certificate is added on Server side in the list (like you show) and then must be "Trusted".

[NoRisk4Project]

Hello,

I discussed your issue with development to find out what's going on. With the information we have, we think that the OpenSecureConnection fails and this leads to the error message. This would fit to the point, because the server dosn't receives a certificate from the client.

To find the reason for this behavior we need more information. Could you please discribe your system a bit more in detail?

As far as we understood, you use 2 real ctrlX CORE and the both are version 2.6.x systems, right? Or did you only updated the OPC UA server and client app?

You disguised the IP adresses so I have to ask the following questions. How are the network interfaces of both crtlX CORE configured. Which RJ45 ports are used for the connection to the second crtlX CORE and the PC with the UA Expert? Are the two ctrlX CORE conected direcly or is there a switch inbetween?

[Nathanael]

Hello,

OPC-Client Core is located in our customer office whereas OPC Server Core and 2 additional machines are located in a plant.
Today, these 2 addtional machines equipped with B&R PLC and OPC Servers are properly operating with OPC UA communication (I mean with the OPC Client Core).

Here is the explanation you asked for the Core application: