Unable to connect to a Plesk for Windows server via FTP when the server is behind NAT: PASV FTP error ECONNABORTED

Symptoms

• 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 external 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.

Cause

FTP firewall settings are not configured in IIS on a Windows server.

Resolution

1. Connect to the Plesk server via RDP.

2. Start a command prompt as an Administrator and run the following command to start IIS Manager:

   C:> start inetmgr

3. In IIS Manager, click SERVERNAME > FTP Firewall Support.

   

4. Specify the passive FTP port range and the external IP address of an edge firewall. Once done, click Apply.