FTP 150 File Status OK vs 530 Not Logged In
FTP 150 (File Status OK) is a 1xx Positive Preliminary response, while 530 (Not Logged In) is a 5xx Permanent Negative response. 150 indicates that the file status is okay and the server is about to open the data connection for the transfer. This is the normal precursor to a file transfer. In contrast, 530 means that not logged in. The user is not authenticated and must log in before the requested command can be executed.
描述
The file status is okay and the server is about to open the data connection for the transfer. This is the normal precursor to a file transfer.
何时出现
Right before a file download or upload begins, confirming the file is accessible and the data channel is being opened.
如何修复
No fix needed — this means the transfer is about to start. If the transfer stalls after this reply, check firewall rules blocking the data connection.
描述
Not logged in. The user is not authenticated and must log in before the requested command can be executed.
何时出现
When you try to access files or run commands before authenticating, or after providing incorrect login credentials.
如何修复
Send USER and PASS commands with valid credentials. If login fails repeatedly, verify the username, password, and check if the account is locked.
主要区别
150 is a 1xx Positive Preliminary response, while 530 is a 5xx Permanent Negative response.
FTP 150: The file status is okay and the server is about to open the data connection for the transfer. This is the normal precursor to a file transfer.
FTP 530: Not logged in. The user is not authenticated and must log in before the requested command can be executed.
You encounter 150 when right before a file download or upload begins, confirming the file is accessible and the data channel is being opened.
You encounter 530 when when you try to access files or run commands before authenticating, or after providing incorrect login credentials.
何时使用哪个
For 150 (File Status OK): No fix needed — this means the transfer is about to start. If the transfer stalls after this reply, check firewall rules blocking the data connection. 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.