我已经proftpd安装了一段时间，但从今天起我无法登录到 ftp 服务器。我不断收到错误530 login incorrect。
我proftpd在调试模式下重新启动并在尝试登录时得到以下响应：
- srv2.********.nl proftpd[1660] 159.253.3.237 (83.247.33.135[83.247.33.135]): FTP session opened.
- srv2.********.nl proftpd[1660] 159.253.3.237 (83.247.33.135[83.247.33.135]): dispatching PRE_CMD command 'USER bernhard' to mod_tls
- srv2.********.nl proftpd[1660] 159.253.3.237 (83.247.33.135[83.247.33.135]): dispatching PRE_CMD command 'USER bernhard' to mod_core
- srv2.********.nl proftpd[1660] 159.253.3.237 (83.247.33.135[83.247.33.135]): dispatching PRE_CMD command 'USER bernhard' to mod_core
- srv2.********.nl proftpd[1660] 159.253.3.237 (83.247.33.135[83.247.33.135]): dispatching PRE_CMD command 'USER bernhard' to mod_delay
- srv2.********.nl proftpd[1660] 159.253.3.237 (83.247.33.135[83.247.33.135]): dispatching PRE_CMD command 'USER bernhard' to mod_auth …