FTP 200 Command OK vs 220 Service Ready
Both FTP 200 (Command OK) and 220 (Service Ready) belong to the 2xx Positive Completion category. 200 indicates that the command has been successfully executed. This is a general acknowledgment that the command was understood and carried out. Meanwhile, 220 means that service ready for new user. This is the greeting message sent by the FTP server when a client first connects.
説明
The command has been successfully executed. This is a general acknowledgment that the command was understood and carried out.
このコードが表示される場合
After issuing any command that completes successfully, such as TYPE, MODE, or NOOP.
解決方法
No fix needed — the command succeeded. This is the standard positive response for commands that don't return data.
説明
Service ready for new user. This is the greeting message sent by the FTP server when a client first connects.
このコードが表示される場合
Immediately upon connecting to an FTP server. This is the welcome banner confirming the server is accepting connections.
解決方法
No fix needed — the server is ready. Proceed with USER and PASS commands to authenticate.
主な違い
FTP 200: The command has been successfully executed. This is a general acknowledgment that the command was understood and carried out.
FTP 220: Service ready for new user. This is the greeting message sent by the FTP server when a client first connects.
You encounter 200 when after issuing any command that completes successfully, such as TYPE, MODE, or NOOP.
You encounter 220 when immediately upon connecting to an FTP server. This is the welcome banner confirming the server is accepting connections.
どちらをいつ使うか
For 200 (Command OK): No fix needed — the command succeeded. This is the standard positive response for commands that don't return data. For 220 (Service Ready): No fix needed — the server is ready. Proceed with USER and PASS commands to authenticate.