I have a C# program that makes it easy to transfer files using the ftp protocol. It works fine on Server A. But on Server B it throws an exception after the data channel is "connected," at the point where it tries to "connect" the control channel. I have configured the ftp feature under IIS on the Server B so that all available port numbers are available to be used. Every single one. Yet I get a timeout. What else can I try? The firewall is completely disabled. Windows Server 2016 provides the following hint: A connection attempt failed because the connected party did not properly respond after a period of time, or established connection failed because connected host has failed to respond xx.xx.xx.xx:59726
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