FTP 150 File Status OK vs 426 Connection Closed
FTP 150 (File Status OK) is a 1xx Positive Preliminary response, while 426 (Connection Closed) is a 4xx Transient 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, 426 means that connection closed; transfer aborted. The data connection was closed unexpectedly during a file transfer.
Descripción
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.
Cuándo lo verás
Right before a file download or upload begins, confirming the file is accessible and the data channel is being opened.
Cómo solucionarlo
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.
Descripción
Connection closed; transfer aborted. The data connection was closed unexpectedly during a file transfer.
Cuándo lo verás
When a file transfer is interrupted due to a network timeout, client disconnect, or the data connection dropping mid-transfer.
Cómo solucionarlo
Retry the transfer. If it keeps failing, check network stability, increase timeout values, and verify there are no firewalls killing idle connections.
Diferencias clave
150 is a 1xx Positive Preliminary response, while 426 is a 4xx Transient 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 426: Connection closed; transfer aborted. The data connection was closed unexpectedly during a file transfer.
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 426 when when a file transfer is interrupted due to a network timeout, client disconnect, or the data connection dropping mid-transfer.
Cuándo usar cada uno
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 426 (Connection Closed): Retry the transfer. If it keeps failing, check network stability, increase timeout values, and verify there are no firewalls killing idle connections.