vsftp登录的问题

eagle_fan

ftp server:
redhat 9.0
vsftpd

我使用ftp -i -n xx.xx.xx.xx登录执行cronjob

使用windows平台的客户端可以登录
C:\Documents and Settings\eagle>;ftp -i -n xx.xx.xx.xx
Connected to 10.56.0.5.
220 Check Point FireWall-1 Secure FTP server running on aseshfw
ftp>; user eagle
331 (not authenticated): Enter server password
Password:
230-Connected to server. Logging in...
230-220 Welcome to ASESH FTP service.
230-331 Please specify the password.
230 230 Login successful. Have fun.
ftp>;

但是在unix平台上就不行
L2000_cn:root />;ftp -i -n xx.xx.xx.xx
Connected to 10.56.0.5.
220 Check Point FireWall-1 Secure FTP server running on aseshfw
421 Service not available, remote server has closed connection

unix platform:
L2000_cn:root />;uname -a
HP-UX L2000_cn B.11.00 U 9000/800 152901597 unlimited-user license

不知道是哪儿设置有问题
普通ftp xx.xx.xx.xx 的interactive 模式下是可以的

请教