A Plesk Server is behind NAT.
When accessing a Plesk server via FTP in the passive mode using the external IP address, the connection fails with the following error message:
Error: Disconnected from server: ECONNABORTED - Connection aborted
Error: Failed to retrieve directory listing
When accessing a Plesk server via FTP in the passive mode using the internal IP address, the connection fails with the following error message:
425-Cannot open data connection.
Win32 error: The network connection was aborted by the local system.
Error details: Client IP on the control channel didn't match the client IP on the data channel.
FTP firewall settings are not configured in IIS on a Windows server.
Connect to the Plesk server via RDP.
Start a command prompt as an Administrator and run the following command to start IIS Manager:
C:> start inetmgr
In IIS Manager, click SERVERNAME > FTP Firewall Support.
Specify the passive FTP port range and the external IP address of an edge firewall. Once done, click Apply.