FTP 200 Command OK vs 502 Command Not Implemented
FTP 200 (Command OK) is a 2xx Positive Completion response, while 502 (Command Not Implemented) is a 5xx Permanent Negative response. 200 indicates that the command has been successfully executed. This is a general acknowledgment that the command was understood and carried out. In contrast, 502 means that command not implemented. The server recognizes the command but does not support it in its current configuration.
Descrição
The command has been successfully executed. This is a general acknowledgment that the command was understood and carried out.
Quando você o vê
After issuing any command that completes successfully, such as TYPE, MODE, or NOOP.
Como corrigir
No fix needed — the command succeeded. This is the standard positive response for commands that don't return data.
Descrição
Command not implemented. The server recognizes the command but does not support it in its current configuration.
Quando você o vê
When you use a valid FTP command that this particular server has not implemented, such as SITE or SMNT.
Como corrigir
Use an alternative command or approach. Check the server's FEAT response or HELP output to see which commands are actually supported.
Diferenças principais
200 is a 2xx Positive Completion response, while 502 is a 5xx Permanent Negative response.
FTP 200: The command has been successfully executed. This is a general acknowledgment that the command was understood and carried out.
FTP 502: Command not implemented. The server recognizes the command but does not support it in its current configuration.
You encounter 200 when after issuing any command that completes successfully, such as TYPE, MODE, or NOOP.
You encounter 502 when when you use a valid FTP command that this particular server has not implemented, such as SITE or SMNT.
Quando usar qual
For 200 (Command OK): No fix needed — the command succeeded. This is the standard positive response for commands that don't return data. 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.