FTP 211 System Status vs 425 Can't Open Data Connection
FTP 211 (System Status) is a 2xx Positive Completion response, while 425 (Can't Open Data Connection) 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, 425 means that can't open data connection. The server was unable to establish the data channel needed for the file transfer.
Deskripsi
System status or system help reply. The server provides information about its current status or available features.
Ketika Anda Melihatnya
After issuing the STAT command without arguments, the server returns its system status and supported features.
Cara Memperbaiki
No fix needed — this is an informational response. Use the information to understand the server's capabilities and current state.
Deskripsi
Can't open data connection. The server was unable to establish the data channel needed for the file transfer.
Ketika Anda Melihatnya
When a firewall or NAT is blocking the data connection, or the client failed to connect to the server's passive port.
Cara Memperbaiki
Switch between active (PORT) and passive (PASV) modes. Check that your firewall allows the FTP data port range and that NAT is configured correctly.
Perbedaan Utama
211 is a 2xx Positive Completion response, while 425 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 425: Can't open data connection. The server was unable to establish the data channel needed for the file transfer.
You encounter 211 when after issuing the STAT command without arguments, the server returns its system status and supported features.
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.
Kapan Menggunakan Yang Mana
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 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.