Problem With OPC UA Server Port 49320

[GD_9146088]

Hello everybody. We have a server with KepServerEX  (6.12.361.0) and Ignition (7.9.21)  installed as client of Kepware. In the OPC UA Configuration, the server endpoint is setted as default : opc.tcp://127.0.0.1:49320.

Everything was working fine until last week. but now Ignition is in error becuase can not connect to the OPC server (kepware) . I noticed that even if the KepServerEx service is running, I can not see the port 49320 in Listening state ( I used the command C:\ ....\netstat -aon). I installed a Kepware on my laptop and when the service is running I can find this row (with the same command ...\netstat -aon):

TCP      127.0.0.1:49320       0.0.0.0:0      LISTENING       15340

I tried to change the port number in the server but nothing changes.

Other informations:

The device connected to Kepware (channels) communicate perfectly.

The server is not connected to the internet, the firewall is disabled, OS is Windows Server 2019.

Using a tool the check the port status I see the port 49320 closed, not in error. The other ports are working well.

Do you have any suggestions?

Thank you in advance

Guido De Biase

[rajskumar]

Kepware Runtime request the OS to open a listening socket on the target OPC UA port (typically 49320), 

Have you checked if IT policies in place that is preventing this?

Please stop/start the runtime and check if it is works?

If the issue persist; I recommend opening a support ticket with the Kepware Technical Support team. Here is a link to the my kepware login page where a ticket can submitted:

https://my.kepware.com/s/login/

[rajskumar · Accepted solution]

Also observe Event log messages and see if you are getting any such errors

• In the server Event Log, it shows: 
  • Socket error occurred connecting. | Error = 10061, Details = 'No connection could be made because the target machine actively refused it.'
  • Socket error occurred sending data. Error 10054, Details= 'An existing connection was forcibly closed by the remote host.'
  • Socket error occurred connecting. | Error = 10038, Details = 'An operation was attempted on something that is not a socket.'

If this is the case, refer below article for troubleshooting

https://www.ptc.com/en/support/article/CS299048