Deleting the old certificates

To promote secure communication in Niagara 4 it is recommended that you install new TLS certificates. This procedure deletes the old certificates. Perform these steps for each station, Supervisor and all remote stations.
Prerequisites: You are using the Supervisor PC running Workbench. All stations are idle.
 NOTE: Subsequent procedures assume that this installation uses default self-signed certificates. If the company uses signed certificates (the most secure configuration), you will need to create a new root CA certificate, create a new server certificate for each platform/station, use the root CA certificate to sign each server certificate and install each signed server certificate after completing the migration. 

While you may delete certificates using the browser (web UI), this procedure manages all certificate processes using Workbench.

Perform the following steps:
  1. Open a platform connection to the Supervisor PC or remote controller (File > Open > Open Platform.
  2. Expand the Platform node and double-click Certificate Management in the Nav tree.
    Image
  3. In the User Key Store, select the certificate, click Delete (as shown above) and click Yesto confirm the deletion.
  4. Select the Allowed Hosts tab, select an allowed self-signed certificate, click Delete and click Yes to confirm the deletion.
    This action deletes the certificate.
  5. Restart the station.
  6. Perform these steps in the Supervisor and each remote station.