Ftp Codes List

I've written this Tute for total n00bz at my Site so you might find it a bit patronizing. I beg your pardon if you find it so. ~Anyway, for those who are interested, feel free to use it as a reference.


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You might have seen a 3 digit number before your FTP message everytime your FTP client communicate with you. Most popular ones are 421 - Server busy/Max connections reached.

But here's a complete list of codes and what it means so you know what is exactly happening.

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100 Series - The requested action is being initiated, expect another reply before proceeding with a new command.

110 Restart marker reply.
120 Service ready in x minutes.
125 Data connection already open, transfer starting.
150 File status okay, about to open data connection.

200 Series - The requested action has been successfully completed.

200 Command okay.
202 Command not implemented, superflous at this site.
211 System status, or system help reply.
212 Directory status.
213 File status.
214 Help message.
215 NAME system type. (Where NAME is an official system name from the list in the Assigned Numbers document.)
220 Service ready for new user.
221 Service closing control connection. Logged out if appropriate.
225 Data connection open; no transfer in progress.
226 Closing data connection. Requested file action successful (for example, file transfer or file abort).
227 Entering Passive Mode
230 User logged in, proceed.
250 Requested file action okay, completed.
257 "PATHNAME" created.

300 Series - The command has been accepted, but the requested action is being held in abeyance, pending receipt of further information.

331 User name okay, need password.
332 Need account for login.
350 Requested file action pending further information.


400 Series - The command was not accepted and the requested action did not take place, but the error condition is temporary and the action may be requested again

421 Service not available, closing control connection. This may be a reply to any command if the service knows it must shut down.
425 Can't open data connection.
426 Connection closed; transfer aborted.
450 Requested file action not taken. File unavailable (e.g., file busy).
451 Requested action aborted: local error in processing.
452 Requested action not taken. Insufficient storage space in system.

500 Series - The command was not accepted and the requested action did not take place

500 Syntax error, command unrecognized. This may include errors such as command line too long.
501 Syntax error in parameters or arguments.
502 Command not implemented.
503 Bad sequence of commands.
504 Command not implemented for that parameter.
530 Not logged in.
532 Need account for storing files.
550 Requested action not taken. File unavailable (e.g., file not found, no access).
552 Requested file action aborted. Exceeded storage allocation (for current directory or dataset).
553 Requested action not taken. File name not allowed.

End.