ctrlX OPC UA client to a Rexroth IoT Gateway OPC UA server error DL_COMMUNICATION_ERROR

Hello,

I need for an application to connect a ctrlX as an OPC UA client to an existing Rexdroth IoT Gateway as OPC UA Server.

I tested it OPC UA connection to the IoT Gateway with UA expert and it works fine : 

 

With following settings: 

Now, when I try to connect my ctrlX OPC UA client it does not work, I have always an error : DL_COMMUNICATION_ERROR: 

I searched on ctrlX user manual and alos with the question mark : (?) on the error but the description is empty :

I checked ctrlX log files and IoT gateway log files but I didn't find any information about this problem.

Here are  my client OPC UA settings : 

I tested from my ctrlX to ping the IoT Gateway and it works.

I checked if port  9999 is open and it is also ok.

I added (manually) on the IoT Gateway OPC UA server the certificate of my ctrlX client but it didn't improve the problem///

Where can be my mistake? Do you have any idea?

Best reply by ThibaultM

Hello,

Finally, I found the issue and it was a bad Windows firewall settings, I didn't open the right port number : 9999

No the OPC UA client connection from my ctrlX to the IoT Gatreway is working : 

Thanks for your help

 

 

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