FTP 202 Command Superfluous vs 530 Not Logged In
FTP 202 (Command Superfluous) is a 2xx Positive Completion response, while 530 (Not Logged In) is a 5xx Permanent Negative response. 202 indicates that the command is not implemented but is recognized as superfluous. The server acknowledges the command but it has no effect. In contrast, 530 means that not logged in. The user is not authenticated and must log in before the requested command can be executed.
Mô tả
The command is not implemented but is recognized as superfluous. The server acknowledges the command but it has no effect.
Khi bạn thấy mã này
When you send a command the server recognizes but considers unnecessary, such as ALLO on a server that does not require pre-allocation.
Cách khắc phục
No fix needed — the server is telling you the command is not necessary. You can safely ignore this response and continue.
Mô tả
Not logged in. The user is not authenticated and must log in before the requested command can be executed.
Khi bạn thấy mã này
When you try to access files or run commands before authenticating, or after providing incorrect login credentials.
Cách khắc phục
Send USER and PASS commands with valid credentials. If login fails repeatedly, verify the username, password, and check if the account is locked.
Sự khác biệt chính
202 is a 2xx Positive Completion response, while 530 is a 5xx Permanent Negative response.
FTP 202: The command is not implemented but is recognized as superfluous. The server acknowledges the command but it has no effect.
FTP 530: Not logged in. The user is not authenticated and must log in before the requested command can be executed.
You encounter 202 when when you send a command the server recognizes but considers unnecessary, such as ALLO on a server that does not require pre-allocation.
You encounter 530 when when you try to access files or run commands before authenticating, or after providing incorrect login credentials.
Khi nào dùng cái nào
For 202 (Command Superfluous): No fix needed — the server is telling you the command is not necessary. You can safely ignore this response and continue. 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.