FTP 220 Service Ready vs 451 Local Error
FTP 220 (Service Ready) is a 2xx Positive Completion response, while 451 (Local Error) is a 4xx Transient Negative response. 220 indicates that service ready for new user. This is the greeting message sent by the FTP server when a client first connects. In contrast, 451 means that requested action aborted: local error in processing. The server encountered an unexpected error while trying to complete the command.
Deskripsi
Service ready for new user. This is the greeting message sent by the FTP server when a client first connects.
Ketika Anda Melihatnya
Immediately upon connecting to an FTP server. This is the welcome banner confirming the server is accepting connections.
Cara Memperbaiki
No fix needed — the server is ready. Proceed with USER and PASS commands to authenticate.
Deskripsi
Requested action aborted: local error in processing. The server encountered an unexpected error while trying to complete the command.
Ketika Anda Melihatnya
When the server has an internal issue like a disk I/O error, memory shortage, or filesystem problem during command processing.
Cara Memperbaiki
Retry the command. If the error persists, contact the server administrator to check disk health, available memory, and server logs.
Perbedaan Utama
220 is a 2xx Positive Completion response, while 451 is a 4xx Transient Negative response.
FTP 220: Service ready for new user. This is the greeting message sent by the FTP server when a client first connects.
FTP 451: Requested action aborted: local error in processing. The server encountered an unexpected error while trying to complete the command.
You encounter 220 when immediately upon connecting to an FTP server. This is the welcome banner confirming the server is accepting connections.
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.
Kapan Menggunakan Yang Mana
For 220 (Service Ready): No fix needed — the server is ready. Proceed with USER and PASS commands to authenticate. For 451 (Local Error): Retry the command. If the error persists, contact the server administrator to check disk health, available memory, and server logs.