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Janos
Asked: 2020-07-16 06:11:39 +0800 CST

How to connect to older samba shares with Ubuntu 20.04?

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My other desktop has linux with samba 3.x I recently upgraded my HP15 laptop from xubuntu 18.04 to 20.04 with a virgin installation. I was able to use cif mounting and file sharing back and fourth from my other linux machine running samba 3.x to my HP laptop vith xubuntu 18.04. Now the HP laptop can only find itself on samba (Thunar Browse network). Based on Internet search the only modifications I made to my smb.conf are

client lanman auth = yes
ntlm auth = yes

but there is no connection either way.

I understand that samba server is not part of the 20.04, only samba-common is included. I did sudo apt install samba but no connection is possible, just errors. Once more: connection was OK with 18.04.

networking samba xubuntu 20.04

1 Answers

  1. Best Answer

    To connect to the old samba server add one more option to your smb.conf - above the others you have above:

    client min protocol = NT1

    If you want to have the older machine access the Ubuntu 20 server you need to add SMB1 support on the server end:

    server min protocol = NT1

    Then restart smbd: sudo service smbd restart

    Reason: The version of Samba in Ubuntu 20 disables SMB1 ( samba calls it NT1 ) on both the client and server end. Although you can make an initial connection to the server it will start with SMB2 by default. There is no SMB2 in Samba 3.x.

    Although mount.cifs is controlled by the Linux kernel and not smb.conf it does something similar. By default it starts with SMB2. To do a cifs mount of the older system you need to specify that you want it to use smb1. CIFS calls it vers=1.0. You can also replicate the client lanman auth = yes smb.conf option with a sec=ntlm

    So add to your cifs mount statement: vers=1.0,sec=ntlm

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