我正在尝试在 cpanel/whm 服务器上启用 ftp，但用户登录时遇到问题。端口已打开，我可以看到连接已到达服务器，因为它们已记录。但是客户端显示超时，日志只是说用户随后立即注销。
有人能解释一下并为我提供解决方案吗？该服务器正在运行 Cloudlinux、Litespeed 和 CageFS，但是我已测试为用户禁用每个服务，但无济于事。
Error log from filezilla:
Status: Connecting to [ip address]:21...
Status: Connection established, waiting for welcome message...
Status: Initializing TLS...
Status: Verifying certificate...
Status: TLS connection established.
Status: Logged in
Status: Retrieving directory listing...
Command: PWD
Response: 257 "/" is your current location
Command: TYPE I
Response: 200 TYPE is now 8-bit binary
Command: PASV
Response: 227 Entering Passive Mode ([ip address stuff])
Command: MLSD
Error: The data connection could not be established: ETIMEDOUT - Connection attempt timed out
Error: Connection timed out after 20 seconds of inactivity
Error: Failed to retrieve directory listing
答案1
为了解决这个问题，我提到https://documentation.cpanel.net/display/CKB/How+to+Enable+FTP+Passive+Mode 并通过我的防火墙启用了端口范围 49152 - 65534。