FTP 211 System Status vs 502 Command Not Implemented
FTP 211 (System Status) is a 2xx Positive Completion response, while 502 (Command Not Implemented) is a 5xx Permanent Negative response. 211 indicates that system status or system help reply. The server provides information about its current status or available features. In contrast, 502 means that command not implemented. The server recognizes the command but does not support it in its current configuration.
Descripción
System status or system help reply. The server provides information about its current status or available features.
Cuándo lo verás
After issuing the STAT command without arguments, the server returns its system status and supported features.
Cómo solucionarlo
No fix needed — this is an informational response. Use the information to understand the server's capabilities and current state.
Descripción
Command not implemented. The server recognizes the command but does not support it in its current configuration.
Cuándo lo verás
When you use a valid FTP command that this particular server has not implemented, such as SITE or SMNT.
Cómo solucionarlo
Use an alternative command or approach. Check the server's FEAT response or HELP output to see which commands are actually supported.
Diferencias clave
211 is a 2xx Positive Completion response, while 502 is a 5xx Permanent Negative response.
FTP 211: System status or system help reply. The server provides information about its current status or available features.
FTP 502: Command not implemented. The server recognizes the command but does not support it in its current configuration.
You encounter 211 when after issuing the STAT command without arguments, the server returns its system status and supported features.
You encounter 502 when when you use a valid FTP command that this particular server has not implemented, such as SITE or SMNT.
Cuándo usar cada uno
For 211 (System Status): No fix needed — this is an informational response. Use the information to understand the server's capabilities and current state. 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.