FTP 214 Help Message vs 228 Entering Long Passive Mode
Both FTP 214 (Help Message) and 228 (Entering Long Passive Mode) belong to the 2xx Positive Completion category. 214 indicates that help message. The server provides information about its implementation status, including a list of recognized commands or help for a specific command. Meanwhile, 228 means that entering Long Passive Mode. An extended version of passive mode that supports longer addresses, including IPv6. Largely superseded by EPSV (229).
描述
Help message. The server provides information about its implementation status, including a list of recognized commands or help for a specific command.
何时出现
After issuing the HELP command. The server returns a list of supported commands or detailed usage for a specific command.
如何修复
No fix needed — this is an informational response. Use it to discover which commands the server supports.
描述
Entering Long Passive Mode. An extended version of passive mode that supports longer addresses, including IPv6. Largely superseded by EPSV (229).
何时出现
After issuing the LPSV command on servers that support long addresses. Rarely seen in practice as EPSV is preferred.
如何修复
No fix needed, but consider using EPSV (Extended Passive Mode) instead, which is more widely supported and simpler to parse.
主要区别
FTP 214: Help message. The server provides information about its implementation status, including a list of recognized commands or help for a specific command.
FTP 228: Entering Long Passive Mode. An extended version of passive mode that supports longer addresses, including IPv6. Largely superseded by EPSV (229).
You encounter 214 when after issuing the HELP command. The server returns a list of supported commands or detailed usage for a specific command.
You encounter 228 when after issuing the LPSV command on servers that support long addresses. Rarely seen in practice as EPSV is preferred.
何时使用哪个
For 214 (Help Message): No fix needed — this is an informational response. Use it to discover which commands the server supports. For 228 (Entering Long Passive Mode): No fix needed, but consider using EPSV (Extended Passive Mode) instead, which is more widely supported and simpler to parse.