[Samba] SMB1 Windows API FindFirstFile broken for DFS

[Jeremy Allison]

On Thu, Feb 09, 2023 at 10:30:45AM -0600, Kenneth Hagin via samba wrote:
>I have Samba on openSUSE Leap 15.4.  I have a legacy Windows 2003 computer
>(WHS v1) on my network.  At some point in openSUSE updates (even before
>15.4), my ability for WHS to browse DFS links on openSUSE broke.  I also
>have Windows 2008 and Windows 10 systems which continue to work as expected.
>I recently discovered that the source of the problem is that the Windows API
>FindFirstFile no longer works on a DFS link.  It works fine when accessing
>the target share directly.  *ALSO*, I can access a file on the DFS link if I
>use the filename directly, example "copy \\samson\dfs\data\test.txt
><file://samson/dfs/data/test.txt>  .", avoiding usage of FindFirstFile.  I
>realize this is SMB1, which is deprecated, but I'd really like to fully use
>my WHS system as long as possible (it's not open to the Internet) for
>backups and such.

To debug this needs wireshark traces to compare between a working
and failing system. Also it's not clear what client and what server
are being used in your examples.