FTP 211 System Status vs 225 Data Connection Open
Both FTP 211 (System Status) and 225 (Data Connection Open) belong to the 2xx Positive Completion category. 211 indicates that system status or system help reply. The server provides information about its current status or available features. Meanwhile, 225 means that data connection open; no transfer in progress. The data channel is established and ready but no file transfer has started yet.
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.
説明
Data connection open; no transfer in progress. The data channel is established and ready but no file transfer has started yet.
このコードが表示される場合
When the data connection is established but idle, waiting for a transfer command to begin sending or receiving data.
解決方法
No fix needed — the data connection is ready. Issue a RETR, STOR, or LIST command to start using it.
主な違い
FTP 211: System status or system help reply. The server provides information about its current status or available features.
FTP 225: Data connection open; no transfer in progress. The data channel is established and ready but no file transfer has started yet.
You encounter 211 when after issuing the STAT command without arguments, the server returns its system status and supported features.
You encounter 225 when when the data connection is established but idle, waiting for a transfer command to begin sending or receiving data.
どちらをいつ使うか
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 225 (Data Connection Open): No fix needed — the data connection is ready. Issue a RETR, STOR, or LIST command to start using it.