FTP 202 Command Superfluous vs 225 Data Connection Open
Both FTP 202 (Command Superfluous) and 225 (Data Connection Open) belong to the 2xx Positive Completion category. 202 indicates that the command is not implemented but is recognized as superfluous. The server acknowledges the command but it has no effect. Meanwhile, 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 command is not implemented but is recognized as superfluous. The server acknowledges the command but it has no effect.
Quando você o vê
When you send a command the server recognizes but considers unnecessary, such as ALLO on a server that does not require pre-allocation.
Como corrigir
No fix needed — the server is telling you the command is not necessary. You can safely ignore this response and continue.
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
FTP 202: The command is not implemented but is recognized as superfluous. The server acknowledges the command but it has no effect.
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 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 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 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 225 (Data Connection Open): No fix needed — the data connection is ready. Issue a RETR, STOR, or LIST command to start using it.