On a Windows Vista-based computer, you use an FTP client to connect to a remote FTP server that requires a user name and a password to log on. When you use some FTP commands, such as dir, ls, and get, you may receive an error message after a long pause.

Note: The IPsec policies on the Windows Vista-based computer require IPsec on incoming connections. However, the policies do not allow for IPsec on outgoing connections to the remote server.

For example, when you use the ls command, you may receive an error message that resembles the following:

200 PORT command successful.
150 Opening ASCII mode data connection for file list.
Aborting any active data connections…
425 Can’t open data connection.
Connection closed by remote host.

On a computer that has Windows Internet Explorer 7 installed, you may be unable to use an FTP application to upload a file to a remote server.

This problem occurs if the application is based on WinINet FTP functions.

When you try to open an FTP site by using a Web proxy in Windows Internet Explorer 7, you cannot open the FTP Web site. This behavior occurs if the Web site URL contains the following entry:

domain\username

You may be unable open the FTP site even after you replace the backslash (\) by using its URL-encoded form (%5c).