FTP 214 Help Message vs 502 Command Not Implemented
FTP 214 (Help Message) is a 2xx Positive Completion response, while 502 (Command 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, 502 means that command not implemented. The server recognizes the command but does not support it in its current configuration.
Mô tả
Help message. The server provides information about its implementation status, including a list of recognized commands or help for a specific command.
Khi bạn thấy mã này
After issuing the HELP command. The server returns a list of supported commands or detailed usage for a specific command.
Cách khắc phục
No fix needed — this is an informational response. Use it to discover which commands the server supports.
Mô tả
Command not implemented. The server recognizes the command but does not support it in its current configuration.
Khi bạn thấy mã này
When you use a valid FTP command that this particular server has not implemented, such as SITE or SMNT.
Cách khắc phục
Use an alternative command or approach. Check the server's FEAT response or HELP output to see which commands are actually supported.
Sự khác biệt chính
214 is a 2xx Positive Completion response, while 502 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 502: Command not implemented. The server recognizes the command but does not support it in its current configuration.
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 502 when when you use a valid FTP command that this particular server has not implemented, such as SITE or SMNT.
Khi nào dùng cái nào
For 214 (Help Message): No fix needed — this is an informational response. Use it to discover which commands the server supports. For 502 (Command Not Implemented): Use an alternative command or approach. Check the server's FEAT response or HELP output to see which commands are actually supported.