“503 Use AUTH First”错误是FileZilla Server在尝试建立FTP连接时遇到的一个常见问题。这通常发生在客户端尝试以明文(非加密)方式登录到服务器,而服务器配置为要求使用加密连接(如FTP over TLS)时。服务器通过发送此错误消息来告知客户端,它不接受未加密的登录尝试。
FileZilla Server 最新版本配置 FAQ 503 Use AUTH first 使用:Explicit FTP over TLS and insecure plain FTP 协议即可。 参考: Update produces “503 use AUTH first” – FileZilla Forums (filezilla-project.org) 无法显示远程文件夹 LIST -a 550Unknown error 权限问题。 参考: https://blog.csdn.net/qq_...
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