FTP 220 Service Ready vs 530 Not Logged In
FTP 220 (Service Ready) is a 2xx Positive Completion response, while 530 (Not Logged In) is a 5xx Permanent 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, 530 means that not logged in. The user is not authenticated and must log in before the requested command can be executed.
Описание
Service ready for new user. This is the greeting message sent by the FTP server when a client first connects.
Когда вы это видите
Immediately upon connecting to an FTP server. This is the welcome banner confirming the server is accepting connections.
Как исправить
No fix needed — the server is ready. Proceed with USER and PASS commands to authenticate.
Описание
Not logged in. The user is not authenticated and must log in before the requested command can be executed.
Когда вы это видите
When you try to access files or run commands before authenticating, or after providing incorrect login credentials.
Как исправить
Send USER and PASS commands with valid credentials. If login fails repeatedly, verify the username, password, and check if the account is locked.
Ключевые различия
220 is a 2xx Positive Completion response, while 530 is a 5xx Permanent 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 530: Not logged in. The user is not authenticated and must log in before the requested command can be executed.
You encounter 220 when immediately upon connecting to an FTP server. This is the welcome banner confirming the server is accepting connections.
You encounter 530 when when you try to access files or run commands before authenticating, or after providing incorrect login credentials.
Когда что использовать
For 220 (Service Ready): No fix needed — the server is ready. Proceed with USER and PASS commands to authenticate. 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.