FTP 211 System Status vs 530 Not Logged In
FTP 211 (System Status) is a 2xx Positive Completion response, while 530 (Not Logged In) is a 5xx Permanent Negative response. 211 indicates that system status or system help reply. The server provides information about its current status or available features. In contrast, 530 means that not logged in. The user is not authenticated and must log in before the requested command can be executed.
説明
System status or system help reply. The server provides information about its current status or available features.
このコードが表示される場合
After issuing the STAT command without arguments, the server returns its system status and supported features.
解決方法
No fix needed — this is an informational response. Use the information to understand the server's capabilities and current state.
説明
Not logged in. The user is not authenticated and must log in before the requested command can be executed.
このコードが表示される場合
When you try to access files or run commands before authenticating, or after providing incorrect login credentials.
解決方法
Send USER and PASS commands with valid credentials. If login fails repeatedly, verify the username, password, and check if the account is locked.
主な違い
211 is a 2xx Positive Completion response, while 530 is a 5xx Permanent Negative response.
FTP 211: System status or system help reply. The server provides information about its current status or available features.
FTP 530: Not logged in. The user is not authenticated and must log in before the requested command can be executed.
You encounter 211 when after issuing the STAT command without arguments, the server returns its system status and supported features.
You encounter 530 when when you try to access files or run commands before authenticating, or after providing incorrect login credentials.
どちらをいつ使うか
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 530 (Not Logged In): Send USER and PASS commands with valid credentials. If login fails repeatedly, verify the username, password, and check if the account is locked.