FTP 215 System Type vs 502 Command Not Implemented
FTP 215 (System Type) is a 2xx Positive Completion response, while 502 (Command Not Implemented) is a 5xx Permanent Negative response. 215 indicates that the NAME system type, where NAME is an official system name from the list in the Assigned Numbers document. Reports the operating system of the server. In contrast, 502 means that command not implemented. The server recognizes the command but does not support it in its current configuration.
説明
The NAME system type, where NAME is an official system name from the list in the Assigned Numbers document. Reports the operating system of the server.
このコードが表示される場合
After issuing the SYST command. The server reports its operating system type, commonly 'UNIX Type: L8' or 'Windows_NT'.
解決方法
No fix needed — use this information to adjust path separators and line endings for the server's OS type.
説明
Command not implemented. The server recognizes the command but does not support it in its current configuration.
このコードが表示される場合
When you use a valid FTP command that this particular server has not implemented, such as SITE or SMNT.
解決方法
Use an alternative command or approach. Check the server's FEAT response or HELP output to see which commands are actually supported.
主な違い
215 is a 2xx Positive Completion response, while 502 is a 5xx Permanent Negative response.
FTP 215: The NAME system type, where NAME is an official system name from the list in the Assigned Numbers document. Reports the operating system of the server.
FTP 502: Command not implemented. The server recognizes the command but does not support it in its current configuration.
You encounter 215 when after issuing the SYST command. The server reports its operating system type, commonly 'UNIX Type: L8' or 'Windows_NT'.
You encounter 502 when when you use a valid FTP command that this particular server has not implemented, such as SITE or SMNT.
どちらをいつ使うか
For 215 (System Type): No fix needed — use this information to adjust path separators and line endings for the server's OS type. 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.