Question & Answer
Question
Datapower has an SFTP server front side handler attached to a MPGW, but an SFTP transfer from a client fails with the unsupported error; please note the following: 20140131T165856Z [sftp][debug] source-ssh-server(E2Iservermode): tid (389683)[94.103.18.107]: SFTP C: INIT ver 3 20140131T165856Z [sftp][debug] source-ssh-server(E2Iservermode): tid (389683)[94.103.18.107]: SFTP S: VERSION (3) 20140131T165856Z [sftp][debug] source-ssh-server(E2Iservermode): tid (389683)[94.103.18.107]: SFTP C: OPEN (1000) (/MFT_DW_INB_GF/IrelandSite_2014-01-31 16-59-06.xml.zip) 20140131T165856Z [sftp][error] source-ssh-server(E2Iservermode): tid (389683)[94.103.18.107]: SFTP Server: SSH_FXP_OPEN [/MFT_DW_INB_GF/IrelandSite_2014-01-31 16-59-06.xml.zip] failed due to unsupported mode [1B]. 20140131T165856Z [sftp][debug] source-ssh-server(E2Iservermode): tid (389683)[94.103.18.107]: SFTP S: STATUS (1000)(4)()() 20140131T165857Z [mq][debug] source-mqfte(MQFTE_BAS_FSH): tid(389619): Disable the message property parsing. What does this mean?
Cause
SFTP Transfer Failures.
Answer
Mode 1B is equivalent to the following flags:
SSH_FXF_READ 0x00000001
SSH_FXF_WRITE 0x00000002
SSH_FXF_CREAT 0x00000008
SSH_FXF_TRUNC 0x00000010
DataPower does not support opening a file for both read and write simultaneously. It uses the flag on the open to determine whether it is a 'GET' (ex. open with read flag) or a 'PUT' (ex. open with a write flag). Using both is considered ambiguous.
Therefore, DataPower responds back with an error "failed due to unsupported mode [1B]". The SFTP client(s) should not open files using both 'read and write' flags at the same time when working with DataPower.
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Document Information
Modified date:
08 June 2021
UID
swg21667402