FTP 213 File Status vs 425 Can't Open Data Connection
FTP 213 (File Status) is a 2xx Positive Completion response, while 425 (Can't Open Data Connection) is a 4xx Transient Negative response. 213 indicates that file status reply. The server provides information about a specific file, typically its size or modification time. In contrast, 425 means that can't open data connection. The server was unable to establish the data channel needed for the file transfer.
描述
File status reply. The server provides information about a specific file, typically its size or modification time.
何时出现
After issuing the SIZE or MDTM command, the server returns the file size in bytes or the last modification timestamp.
如何修复
No fix needed — this is an informational response. Use the returned data to determine file size before download or to check timestamps for synchronization.
描述
Can't open data connection. The server was unable to establish the data channel needed for the file transfer.
何时出现
When a firewall or NAT is blocking the data connection, or the client failed to connect to the server's passive port.
如何修复
Switch between active (PORT) and passive (PASV) modes. Check that your firewall allows the FTP data port range and that NAT is configured correctly.
主要区别
213 is a 2xx Positive Completion response, while 425 is a 4xx Transient Negative response.
FTP 213: File status reply. The server provides information about a specific file, typically its size or modification time.
FTP 425: Can't open data connection. The server was unable to establish the data channel needed for the file transfer.
You encounter 213 when after issuing the SIZE or MDTM command, the server returns the file size in bytes or the last modification timestamp.
You encounter 425 when when a firewall or NAT is blocking the data connection, or the client failed to connect to the server's passive port.
何时使用哪个
For 213 (File Status): No fix needed — this is an informational response. Use the returned data to determine file size before download or to check timestamps for synchronization. For 425 (Can't Open Data Connection): Switch between active (PORT) and passive (PASV) modes. Check that your firewall allows the FTP data port range and that NAT is configured correctly.