FTP 211 System Status vs 451 Local Error
FTP 211 (System Status) is a 2xx Positive Completion response, while 451 (Local Error) is a 4xx Transient Negative response. 211 indicates that system status or system help reply. The server provides information about its current status or available features. In contrast, 451 means that requested action aborted: local error in processing. The server encountered an unexpected error while trying to complete the command.
Mô tả
System status or system help reply. The server provides information about its current status or available features.
Khi bạn thấy mã này
After issuing the STAT command without arguments, the server returns its system status and supported features.
Cách khắc phục
No fix needed — this is an informational response. Use the information to understand the server's capabilities and current state.
Mô tả
Requested action aborted: local error in processing. The server encountered an unexpected error while trying to complete the command.
Khi bạn thấy mã này
When the server has an internal issue like a disk I/O error, memory shortage, or filesystem problem during command processing.
Cách khắc phục
Retry the command. If the error persists, contact the server administrator to check disk health, available memory, and server logs.
Sự khác biệt chính
211 is a 2xx Positive Completion response, while 451 is a 4xx Transient Negative response.
FTP 211: System status or system help reply. The server provides information about its current status or available features.
FTP 451: Requested action aborted: local error in processing. The server encountered an unexpected error while trying to complete the command.
You encounter 211 when after issuing the STAT command without arguments, the server returns its system status and supported features.
You encounter 451 when when the server has an internal issue like a disk I/O error, memory shortage, or filesystem problem during command processing.
Khi nào dùng cái nào
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 451 (Local Error): Retry the command. If the error persists, contact the server administrator to check disk health, available memory, and server logs.