FTP 202 Command Superfluous vs 211 System Status
Both FTP 202 (Command Superfluous) and 211 (System Status) belong to the 2xx Positive Completion category. 202 indicates that the command is not implemented but is recognized as superfluous. The server acknowledges the command but it has no effect. Meanwhile, 211 means that system status or system help reply. The server provides information about its current status or available features.
説明
The command is not implemented but is recognized as superfluous. The server acknowledges the command but it has no effect.
このコードが表示される場合
When you send a command the server recognizes but considers unnecessary, such as ALLO on a server that does not require pre-allocation.
解決方法
No fix needed — the server is telling you the command is not necessary. You can safely ignore this response and continue.
説明
System status or system help reply. The server provides information about its current status or available features.
このコードが表示される場合
After issuing the STAT command without arguments, the server returns its system status and supported features.
解決方法
No fix needed — this is an informational response. Use the information to understand the server's capabilities and current state.
主な違い
FTP 202: The command is not implemented but is recognized as superfluous. The server acknowledges the command but it has no effect.
FTP 211: System status or system help reply. The server provides information about its current status or available features.
You encounter 202 when when you send a command the server recognizes but considers unnecessary, such as ALLO on a server that does not require pre-allocation.
You encounter 211 when after issuing the STAT command without arguments, the server returns its system status and supported features.
どちらをいつ使うか
For 202 (Command Superfluous): No fix needed — the server is telling you the command is not necessary. You can safely ignore this response and continue. For 211 (System Status): No fix needed — this is an informational response. Use the information to understand the server's capabilities and current state.