FTP 214 Help Message vs 504 Parameter Not Implemented
FTP 214 (Help Message) is a 2xx Positive Completion response, while 504 (Parameter Not Implemented) is a 5xx Permanent Negative response. 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. In contrast, 504 means that command not implemented for that parameter. The command is supported but not with the specific parameter value provided.
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
Command not implemented for that parameter. The command is supported but not with the specific parameter value provided.
何时出现
When you use an unsupported transfer type or mode, such as TYPE E (EBCDIC) on a server that only supports ASCII and binary.
如何修复
Use a supported parameter value. Check the server documentation or use FEAT to see which parameter options are available.
主要区别
214 is a 2xx Positive Completion response, while 504 is a 5xx Permanent Negative response.
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 504: Command not implemented for that parameter. The command is supported but not with the specific parameter value provided.
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 504 when when you use an unsupported transfer type or mode, such as TYPE E (EBCDIC) on a server that only supports ASCII and binary.
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 504 (Parameter Not Implemented): Use a supported parameter value. Check the server documentation or use FEAT to see which parameter options are available.