以下关于防火墙配置的描述,错误的是哪一项?[usG]ftpserverenable
[USG]aaa
[UsG-aaa]manager-user ftpuser
[USG-aaa-manager-user-ftpuser]passwordcipher Ftppass#
[USG-aaa-manager-user-ftpuser]level15
[uSG-aaa-manager-user-ftpuser]service-type ftp
[USG-aaa-manager-user-ftpuser]ftp-directory hdal : /