Default Connection to the OPC UA Server
Default Connection to the OPC UA Server
When the UA Gateway is installed for the first time, either through a new installation or an upgrade, a default connection to the legacy UA Server interface is automatically created on the UA Gateway Client Interface.
This is intended to make integration easier, but can be removed or customized to suit the needs and policies of your environment.
Warning: Loading a project file without a UA Gateway connection deletes this default connection.
Notes: • if there is an existing UA Gateway and an update is installed, there are no changes. No default connection is created; the previous project file is used.
• If UA Gateway is not installed and the server is upgraded OR a fresh installation is performed, the default connection is created in the new project, which can then be updated.
The default connection on the client interface uses the default settings of the legacy OPC UA server. These defaults are as follows:
• Identity Policy: Username / Password
• Security Policy: Basic256Sha256
• Message Mode: Sign & Encrypt
• URL: default network adapter and port
The user name / password used in this default connection utilizes a unique UA Gateway interface user found by default in the User Manager. This default user can be modified to change the assigned permissions, but cannot be renamed, deleted, or assigned a new password. The password for this user is unique to each server instance.
Note: If the settings on the legacy OPC UA server are changed, the settings for this connection on the UA Gateway client interface must be updated to match. To update connection settings, perform a PUT with the changed properties on the connection endpoint.When the UA Gateway Application Instance Certificate or the legacy OPC UA Server Application Instance Certificate are updated, the certificate is automatically trusted to ensure the default connection persists.
Re-Creating and Editing the Default Connection
If the default connection gets removed, it can be re-created with the following steps:
1. Retrieve the UA Gateway user password by performing a GET request on the user endpoint. For the user endpoint, see Configuration API Service – Updating a User.
2. Create a connection using the UA Gateway as the user name and the password retrieved above. Security settings must match those enabled in the legacy OPC UA server.
If you need to update the default connection, perform a PUT request on the connection endpoint.