1.确保账户密码，服务器ip地址正确
2.确保账户不在 /etc/ftpusers文件内
3.修改/etc/pam.d/vsftpd 文件
# Standard behaviour for ftpd(8).
auth required pam_listfile.so item=user sense=deny file=/etc/ftpusers onerr=succeed
# Note: vsftpd handles anonymous logins on its own. Do not enable pam_ftp.so.
# Standard pam includes
@include common-account
@include common-session
@include common-auth
#auth required pam_shells.so 修改为下面内容
auth required pam_nologin.so
~
