How in windows server 2012 R2 to determine the ip address to which requests go, but it does not respond?

Question

Windows Server

There is a program (SCADA) that requests data from external devices. There is no access to the SCADA configuration.
To reconfigure an external device, you need to find out the IP to which the request goes, but no response comes.
There is a possible port and access to the server, what means can be used?

Answer 1

netstat