String host = conf.get(FS_FTP_HOST);
int port = conf.getInt(FS_FTP_HOST_PORT, FTP.DEFAULT_PORT);
String user = conf.get(FS_FTP_USER_PREFIX + host);
String password = conf.get(FS_FTP_PASSWORD_PREFIX + host);
client = new FTPClient();
client.connect(host, port);
int reply = client.getReplyCode();
if (!FTPReply.isPositiveCompletion(reply)) {
throw NetUtils.wrapException(host, port,
NetUtils.UNKNOWN_HOST, 0,
new ConnectException("Server response " + reply));