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Ticket Resolution Summary Owner Reporter
#12074 rejected Inability to connect to ProFTPD via keyboard-interactive auth starting with FileZilla 3.46.1 jprostko
Description

Hello,

Connecting to ProFTPD with FileZilla (all platforms), we have run into a connection error that only affects keyboard-interactive authentication. Doing a git bisect on the PuTTY sources (which are utilized by FileZilla), we found that the problematic commit exists between PuTTY 0.70 and 0.71, and is precisely due to PuTTY commit 20a9bd5642ac66ae1190069989d33c5fcefe5672 ( https://git.tartarus.org/?p=simon/putty.git;a=commit;h=20a9bd5642ac66ae1190069989d33c5fcefe5672 ) from July 9, 2018. We have tried various PuTTY versions after the problematic commit, including head, and still have the problem connecting to ProFTPD. We have also tried upgrading ProFTPD to 1.3.7rc1, 1.3.7rc2, and the latest head, and the problem still persists when connecting to it with anything higher than FileZilla 3.46.0 or PuTTY 0.70 (testing done with psftp).

The error message that is returned is the following (this output is from psftp, but the same error comes through with Filezilla 3.46.1 and higher):

Keyboard-interactive authentication prompts from server:
| Password: 
End of keyboard-interactive prompts from server
Access denied
FATAL ERROR: Remote side sent disconnect message
type 11 (by application):
"Unsupported protocol sequence"

For now, we have informed those accessing our systems to do one of the following workarounds:

1.) Roll back to FileZilla 3.46.0 or older (or PuTTY 0.70 or older if utilizing psftp) 2.) Use public key authentication via Pagent or saved key file within FileZilla 3.) Ensure PuTTY is installed, and uncheck the checkbox for 'Attempt "keyboard-interactive" auth (SSH-2)' under SSH->Auth so the connection falls back to password auth. Make sure to save this change to the Default Settings connection profile within PuTTY. 4.) Use a different SFTP client that is not affected in this way.

In summary:

A change in PuTTY at commit 20a9bd5642 resulted in an inability to connect to ProFTPD that wasn't previously present. Since FileZilla relies on the PuTTY libraries and those were recently upgraded for FileZilla version 3.64.1, this problem has now presented itself. It isn't clear (to me) if this is a bug in PuTTY itself or ProFTPD, but I thought I would start with filing a bug here to get started, since FileZilla is used heavily by those accessing our systems, and this problem will become quite problematic as more and more people upgrade their FileZilla clients.

(Also, I saw bug #12066, but have not been able to reproduce that issue on my end. I suspect that issue has to do with pulling in PuTTY changes, but may not be due to the exact commit mentioned in this ticket.)

Thank you for your assistance.

If needed, we have a test environment we can provide to the FileZilla team for troubleshooting/testing purposes.

#12072 duplicate cannot move / drag to subfolders carollee
Description

since update this morning I cannot move/drag files from one folder to a subfolder. file is there, I can transfer to my computer and back, but cannot drag to a subfolder - tells me "no such file or directory" but it is clearly there and I have done it for years.

#12071 duplicate moving files on server results in "no such file or directory" gongtom
Description

When moving a file from one directory to another on any server I try results in an error.: Befehl: mv "FG10_PK_mGS_mNW_20191231_20191216065624.xml" "/home/tri-sftpuser/files/htdocs/datenhandling/uploads/FG10_PK_mGS_mNW_20191231_20191216065624.xml" Fehler: mv FG10_PK_mGS_mNW_20191231_20191216065624.xml /home/tri-sftpuser/files/htdocs/datenhandling/uploads/FG10_PK_mGS_mNW_20191231_20191216065624.xml: no such file or directory

The same command works fine in the previous version of FileZille I am still using.

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