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Kepware Knowledge Base: Solution


Data Change Events Do Not Occur when Connecting Through a VPN


Last Update: 2018/11/12

Problem:
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.

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

Related Products
KEPServerEX

Related Protocols
OPC Data Access (DA)