Issue
How to configure Passive Mode FTP in IIS10
Solution
You need to define a port range in IIS10 and the Windows Firewall.
IIS10 Port range configuration
The port range is defined at the Root level of the IIS10 Manager under "FTP Firewall Support".
"0-0" is the default port (20).
Enter in a range here that defines what passive port range you require.
Enter in the IP address of your VPS under the "External IP Address of Firewall" section.
Windows Firewall Port range configuration
Open up "Windows Firewall with Advanced Security".
Under "Inbound Rules" configure the "FTP Connection" rule setup by IIS10 to allow the same port range you defined in IIS10.
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