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.
描述
System status or system help reply. The server provides information about its current status or available features.
何时出现
After issuing the STAT command without arguments, the server returns its system status and supported features.
如何修复
No fix needed — this is an informational response. Use the information to understand the server's capabilities and current state.
描述
Data connection open; no transfer in progress. The data channel is established and ready but no file transfer has started yet.
何时出现
When the data connection is established but idle, waiting for a transfer command to begin sending or receiving data.
如何修复
No fix needed — the data connection is ready. Issue a RETR, STOR, or LIST command to start using it.
主要区别
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.
何时使用哪个
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.