FTP 150 File Status OK vs 225 Data Connection Open
FTP 150 (File Status OK) is a 1xx Positive Preliminary response, while 225 (Data Connection Open) is a 2xx Positive Completion 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, 225 means that data connection open; no transfer in progress. The data channel is established and ready but no file transfer has started yet.
Descrição
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.
Quando você o vê
Right before a file download or upload begins, confirming the file is accessible and the data channel is being opened.
Como corrigir
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.
Descrição
Data connection open; no transfer in progress. The data channel is established and ready but no file transfer has started yet.
Quando você o vê
When the data connection is established but idle, waiting for a transfer command to begin sending or receiving data.
Como corrigir
No fix needed — the data connection is ready. Issue a RETR, STOR, or LIST command to start using it.
Diferenças principais
150 is a 1xx Positive Preliminary response, while 225 is a 2xx Positive Completion 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 225: Data connection open; no transfer in progress. The data channel is established and ready but no file transfer has started yet.
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 225 when when the data connection is established but idle, waiting for a transfer command to begin sending or receiving data.
Quando usar qual
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 225 (Data Connection Open): No fix needed — the data connection is ready. Issue a RETR, STOR, or LIST command to start using it.