Ubuntu – Can’t connect to smb share after upgrade to Ubuntu Gnome 16.04


After upgrade to Ubuntu Gnome 16.04, I can no longer access my networked media tank's smb share. It's an old (2009) Popcorn Hour A-110.

When I connect to server smb:// in nautilus, I get in an endless loop prompted for login resulting in an authentication failed message. I am certain that username/password are correct, because it works in Windows and I've reset it a dozen times. Note that prior to the upgrade (Ubuntu Gnome 15.10), I would not even be prompted for a username/password, it would just open in the file browser.

So I installed smbclient to see what is going on, and that gives me a hint:

smbclient // -U nmt
Server does not support EXTENDED_SECURITY  but 'client use spnego = yes and 'client ntlmv2 auth = yes'
session setup failed: NT_STATUS_ACCESS_DENIED

That seems to suggest that the nmt server might be too old to support some security scheme that is required by the client.

How can I fix this?

Best Answer

  • This question is a duplicate of this one.

    The answer: you must explicitly set

    client use spnego = no

    in /etc/samba/smb.conf.

    If you can't find this file, execute command:

    sudo apt-get install smbclient
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