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OPC application components are installed on the remote host.
This host has one or more OPC components present and may act as an OPC
Client, Server or both. OPC provides a DCOM interface to allow access
to process control data residing on PLCs, RTUs, and Historians.
OPC Servers function as a gateway.
See also :
Make sure only authorized hosts are allowed to connect to this port.
Risk factor :
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