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OPC Data Client using OPC Server Browser over WAN

I am trying to use the OPC Data Client's server browser component to browse for OPC servers on a remote machine that is on a different subnet. When I try to browse the control never returns anything. Is this supported?

Yes, it is possible to browse for remote OPC servers on a WAN. Set the following property of the EasyDAClient object:

EasyDAClient.ClientParameters.TurnOffActivationSecurity = True

Realize that using OPC DA with DCOM over a WAN may also require you to set other Windows permissions as outlined in our DCOM tutorial, and it will not be fast, so we do recommend that you consider using OPC UA if available on your target OPC server.