OPC UA ports and port configuration

OPC UA communicates via a single TCP port. This is specified in the Endpoint Connection setting in the configuration of the OPC UA Server, and defaults to port 48031. For details, see Configure and deploy the OPC UA service

If you will run multiple OPC UA Servers on the same computer, you must specify a different port number for each subsequent server.

Confirm that this port is not blocked by any firewall software installed on your computer. For information about testing and configuring communications through firewall, see Configure the firewall for the OPC UA service