Ubuntu
samba package

  1. Bug #1855758
  2. Comment #3

Comment 3 for bug 1855758

Revision history for this message
Andreas Hasenack (ahasenack) wrote :

Samba 4.11.x disabled SMB1 by default both for the client and the server (https://www.samba.org/samba/history/samba-4.11.0.html):

SMB1 is disabled by default
---------------------------

The defaults of 'client min protocol' and 'server min protocol'
have been changed to SMB2_02.

This means clients without support for SMB2 or SMB3 are no longer
able to connect to smbd (by default).

It also means client tools like smbclient and other,
as well as applications making use of libsmbclient are no longer
able to connect to servers without SMB2 or SMB3 support (by default).
"""

If your NAS Server only supports SMB1, then this could be the problem.

Can you try setting this in the [global] section of /etc/samba/smb.conf in your ubuntu machine and try again please:

client min protocol = NT1

You might need to logout/login again.