Proftpd 給出“登錄不正確”錯誤

我已經proftpd安裝了一段時間，但從今天開始我無法登錄 ftp 伺服器。我不斷收到錯誤530 login incorrect。

我proftpd在調試模式下重新啟動並在嘗試登錄時得到以下響應：

- 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
- srv2.********.nl proftpd[1660] 159.253.3.237 (83.247.33.135[83.247.33.135]): dispatching CMD command 'USER bernhard' to mod_auth
- srv2.********.nl proftpd[1660] 159.253.3.237 (83.247.33.135[83.247.33.135]): dispatching POST_CMD command 'USER bernhard' to mod_delay
- srv2.********.nl proftpd[1660] 159.253.3.237 (83.247.33.135[83.247.33.135]): dispatching LOG_CMD command 'USER bernhard' to mod_log
- srv2.********.nl proftpd[1660] 159.253.3.237 (83.247.33.135[83.247.33.135]): dispatching PRE_CMD command 'PASS (hidden)' to mod_tls
- srv2.********.nl proftpd[1660] 159.253.3.237 (83.247.33.135[83.247.33.135]): dispatching PRE_CMD command 'PASS (hidden)' to mod_core
- srv2.********.nl proftpd[1660] 159.253.3.237 (83.247.33.135[83.247.33.135]): dispatching PRE_CMD command 'PASS (hidden)' to mod_core
- srv2.********.nl proftpd[1660] 159.253.3.237 (83.247.33.135[83.247.33.135]): dispatching PRE_CMD command 'PASS (hidden)' to mod_delay
- srv2.********.nl proftpd[1660] 159.253.3.237 (83.247.33.135[83.247.33.135]): dispatching PRE_CMD command 'PASS (hidden)' to mod_auth
- srv2.********.nl proftpd[1660] 159.253.3.237 (83.247.33.135[83.247.33.135]): dispatching CMD command 'PASS (hidden)' to mod_auth
- srv2.********.nl proftpd[1660] 159.253.3.237 (83.247.33.135[83.247.33.135]): retrieved UID 500 for user 'bernhard'
- srv2.********.nl proftpd[1660] 159.253.3.237 (83.247.33.135[83.247.33.135]): retrieved group ID: 500
- srv2.********.nl proftpd[1660] 159.253.3.237 (83.247.33.135[83.247.33.135]): retrieved group name: bernhard
- srv2.********.nl proftpd[1660] 159.253.3.237 (83.247.33.135[83.247.33.135]): ROOT PRIVS at mod_auth_pam.c:311
- srv2.********.nl proftpd[1660] 159.253.3.237 (83.247.33.135[83.247.33.135]): RELINQUISH PRIVS at mod_auth_pam.c:481
- srv2.********.nl proftpd[1660] 159.253.3.237 (83.247.33.135[83.247.33.135]): USER bernhard (Login failed): Incorrect password.
- srv2.********.nl proftpd[1660] 159.253.3.237 (83.247.33.135[83.247.33.135]): dispatching POST_CMD_ERR command 'PASS (hidden)' to mod_delay
- srv2.********.nl proftpd[1660] 159.253.3.237 (83.247.33.135[83.247.33.135]): dispatching LOG_CMD_ERR command 'PASS (hidden)' to mod_log
- srv2.********.nl proftpd[1660] 159.253.3.237 (83.247.33.135[83.247.33.135]): dispatching LOG_CMD_ERR command 'PASS (hidden)' to mod_auth
- srv2.********.nl proftpd[1660] 159.253.3.237 (83.247.33.135[83.247.33.135]): FTP session closed.

聽起來很像你安裝的 libpam 在 proftpd 時沒有升級，可以在升級 proftpd 之前嘗試這樣做，看看是否能解決問題。

還要特別檢查proftpd.conf

#這是同時使用基於 PAM 的身份驗證和本地密碼所必需的

#AuthOrder mod_auth_pam.c* mod_auth_unix.c

^^^ 並確保 conf 沒有更新為“通用”

如果這是一個 RHEL 或 CentOS EL6.x 系統，修改您的 PAM 配置很重要，因為該軟體包附帶的配置不好：

編輯：/etc/pam.d/proftpd反映：

#%PAM-1.0M-1.0
auth required pam_listfile.so item=user sense=deny file=/etc/ftpusers onerr=succeed
auth required pam_shells.so
auth include system-auth
account include system-auth
#session include system-auth
session required pam_loginuid.so

引用自：https://serverfault.com/questions/591861