FTP Commands Supported by EFT
During FTP sessions, servers send and receive various numbered codes to/from FTP clients. Some codes represent errors; most others simply communicate the status of the connection.
When determining a course of action, review the entire log; some codes are informational only, others indicate that you have entered the wrong information, and others indicate what information you need to provide before continuing with your file transfer.
For brief explanations for the most common FTP status and error codes, refer to Knowledgebase article #10142 at http://kb.globalscape.com/KnowledgebaseArticle10142.aspx.
Below is the list of FTP commands that EFT supports and will give a known response to, followed by a few commands that it recognizes, but gives an error message of "202 Command not implemented, superfluous at this site."
|
Cmd |
RFC |
Description |
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ABOR |
Abort a file transfer |
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ALLO |
Allocates sufficient storage space to receive a file. e.g., ALLO size [R max-record-size] |
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APPE |
Append data to the end of a file on the remote host. e.g., APPE remote-filename |
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AUTH |
Used to initiate an SSL encrypted session |
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CCC |
Clear Command Channel for FTPS transfers |
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CDUP |
Change working directory to the parent of the current directory |
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CLNT |
- |
Used to identify the client software to the server. This command serves no functional purpose other than to provide information to the server. EFT does not alter its behavior based on the parameters provided in the CLNT command. |
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COMB |
- |
Combines file segments into a single file on EFT. (For information about using the COMB command with EFT, refer to Allowing Multipart Transfers (COMB Command).) |
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CWD |
Change working directory. e.g., CWD remote-directory |
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DELE |
Delete remote file |
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Specifies an extended address and port to which the server should connect |
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EPSV |
Enter extended passive mode |
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FEAT |
List all FTP features that EFT supports |
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HELP |
Display a list of all available FTP commands |
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LANG |
Language Negotiation; defaults to English-US, even if a different language is requested. |
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LIST |
Send list of file names and details |
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MDTM |
Display date/time file was modified, in the format YYYYMMDDhhmmss. YYYY is the four-digit year, MM is the month from 01 to 12, DD is the day of the month from 01 to 31, hh is the hours from 00 to 23, mm is the minutes from 00 to 59, and ss is the seconds from 00 to 59. |
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MKD |
Create (make) a remote directory |
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MLSD |
Display an abbreviated list of a remote directory's files and subdirectories |
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MLST |
Display detailed file or directory information |
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MODE |
Sets the mode in which data is to be transferred to S (Stream) or Z (Compressed); The default mode is Stream. (Only "s" or "z" supported.) |
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NLST |
Send list of file names (no details) |
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NOOP |
Do nothing; often used to keep the session alive. |
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OPTS |
Used to specify optional parameters for the command that follows the OPTS command, if that command supports such optional parameters. (The commands "mslt" and "mode z level X," where x=1-9, are supported.) |
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PASS |
Send password. e.g., PASS <password> |
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PASV |
Enter passive mode |
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PBSZ |
Protection Buffer Size. If EFT receives this command, it sets it to 0. |
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PORT |
Specifies the host and port to which EFT should connect for the next file transfer. |
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PROT |
Data Channel Protection Level. Used to set the protection level to be used for data transfers. PROT P is used to secure the data channel; PROT C is used to clear the data channel. |
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PWD |
Display current directory (print working directory) |
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QUIT |
Closes the connection and terminates the FTP session. |
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REIN |
Reinitialize the connection and cancels the current user/password/account information |
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REST |
Sets the point at which a file transfer should start. e.g., REST position |
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RETR |
Begins transmission of a file from the remote host. Must be preceded by either a PORT command or a PASV command to indicate where EFT should send data. e.g., RETR remote-filename |
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RMD |
Deletes the named directory on the remote host. e.g., RMD remote-directory |
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RNFR |
Rename from (followed by an RNTO command to specify the new name for the file) e.g., RNFR from-filename |
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RNTO |
Rename to (after sending an RNFR command to specify the file to rename, this command is used to specify the new name for the file) e.g., RNTO to-filename |
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SITE |
Site-specific commands. e.g., SITE site-specific-command |
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SIZE |
Display size of a file. e.g., SIZE remote-filename |
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SSCN |
- |
(Set Secured Client Negotiation) Extension for secure site-to-site transfers over SSL/TLS connections |
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STAT |
Display server status. e.g., STAT [remote-filespec] |
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STOR |
Begins transmission of a file to the remote site. Must be preceded by either a PORT command or a PASV command so that EFT knows from where to accept data. e.g., STOR remote-filename |
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STOU |
Begins transmission of a file to the remote site; the remote filename will be unique in the current directory. |
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SYST |
Displays a string of "215 UNIX Type: L8" |
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TYPE |
Sets the type of file to be transferred. For example: TYPE type-character [second-type-character] "type-character" can be A (ASCII text) or I (image, binary data) The second-type-character specifies how the text should be interpreted. It can be N (Non-print; not destined for printing. This is the default if second-type-character is omitted), T (Telnet format control <CR>, <FF>, etc.), or C (ASA Carriage Control). |
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USER |
Send username. e.g., USER username |
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XCUP |
(same as CDUP) |
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XCWD |
- |
(same as CWD) |
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XMKD |
(same as MKD) |
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XNOP |
- |
(same as NOOP) |
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XPWD |
(same as PWD) |
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XRMD |
(same as RMD) |
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XCRC |
- |
Compute CRC32 checksum on specified file |
The following commands are recognized, but not supported:
|
Cmd |
RFC |
Description |
|
ACCT |
Send account information |
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SMNT |
Mount a different file system data structure without altering login or accounting information |
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STRU |
Set file transfer structure |