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Issue 2247 – Limiting SFTP version to 3 with non-well-known SFTP servers as a workaround for interoperability issues

Component: Core

Version: Unspecified

Severity: Enhancement

Priority: Medium

Votes: 0

Status: RESOLVED

Resolution: IMPLEMENTED

Implemented in: 6.4

Last modified: 2024-11-21 08:28

2023-12-27 13:18

What gives an impression of a bug in WinSCP, as the server bug manifests with WinSCP, but not other major SFTP clients, which do not support the newer SFTP versions.

https://winscp.net/forum/viewtopic.php?t=30563
https://winscp.net/forum/viewtopic.php?t=32891
https://winscp.net/forum/viewtopic.php?t=33890
https://winscp.net/forum/viewtopic.php?t=13592
https://winscp.net/forum/viewtopic.php?t=14946
https://winscp.net/forum/viewtopic.php?t=24296
https://winscp.net/forum/viewtopic.php?t=27237
https://winscp.net/forum/viewtopic.php?t=13798

In such case, the problem can be workarounded by setting Preferred SFTP protocol version to 3:
https://winscp.net/eng/docs/ui_login_sftp

2023-12-27 13:32

https://winscp.net/forum/viewtopic.php?t=33904#120562
Emails with clbqavin4.

2024-07-22 13:59

Implemented.
WinSCP now by default uses SFTP 4–6 only with well known and tested servers.

2024-07-23 09:15

Commit 7aa82b90

2024-07-25 14:30

Emails with David Jauregui.

2024-09-23 09:27

Documented:
https://winscp.net/eng/docs/ui_login_sftp#protocol_options
https://winscp.net/eng/docs/incompatible_changes#beta

2024-11-21 08:28

https://winscp.net/forum/viewtopic.php?t=34983

Issue 2247 – Limiting SFTP version to 3 with non-well-known SFTP servers as a workaround for interoperability issues

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