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Kepware Knowledge Base: Solution

Data Change Events Do Not Occur when Connecting Through a VPN

Last Update: 11/12/2018

No data change events occur when connecting an OPC DA client application to KEPServerEX's OPC DA server interface through a Virtual Private Network (VPN).

Possible Cause:
VPNs do not allow callbacks, which are the Data Change and Async Read and Write completion events.

For more information on how VPNs work, contact the local IT department.

Related Products

Related Protocols
OPC Data Access (DA)