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.
Description
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.
When You See It
Right before a file download or upload begins, confirming the file is accessible and the data channel is being opened.
How to Fix
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.
Description
Not logged in. The user is not authenticated and must log in before the requested command can be executed.
When You See It
When you try to access files or run commands before authenticating, or after providing incorrect login credentials.
How to Fix
Send USER and PASS commands with valid credentials. If login fails repeatedly, verify the username, password, and check if the account is locked.
Key Differences
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.
When to Use Which
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.