To fetch multiple files from a private FTP server where the credentials are required, one needs to specify
--ask-password, if not, one gets this report:
Logging in as anonymous ... Error in server response, closing control connection Retrying.
wget -rc --user=your-user-name --ask-password ftp://your.website.com
-r means to recursively get, and
-c means to continue to get a partially downloaded file.