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I have created a Samba share with Ubuntu 19.10 the most easy way: In the files browser, right-click on the folder I want to share, select "Local network share", then at first time a prompt will ask to install the Samba (v4.10.7) packages. Similar to the command line:

sudo apt install samba samba-common

Afterwards, I set up a Samba password for my main user account with this command:

sudo smbpasswd -a {myusername}

Now I can successfully access the shared folder from another Ubuntu or Windows device with my user name and the given Samba password.

However I fail to access using a few years old network media player. It does show the shared network folder and prompt for username and password when trying to connect, but then fails with a simple "cannot access network folder" error.

If I can access the Samba share with a modern computer but not with an older device, what might be the problem?

I had set up Samba shares with older Ubuntu version 16.04 (Samba v3.x) the same way and that still works with my network player. Maybe an old authentication mode, which I would have to enable with Samba v4?

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    Wannacry happened in 2017, which didn't impact Linux/Ubuntu, but did badly impact Microsoft, so they made changes that Linux followed. Ubuntu 16.04 was before the wannacry issues, which is why it worked there, later releases (post-WannaCry) need to be told specifically to work at the lower security level now to be msft compatible, ie. you likely need to specify a ,vers=1.0
    – guiverc
    Mar 2, 2020 at 0:30

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Maybe an old authentication mode, which I would have to enable with Samba v4?

That may very well be the issue. You can try editing /etc/samba/smb.conf and adding the following in the [global] section - like right under workgroup = WORKGROUP:

lanman auth = yes
ntlm auth = yes

THen restarting smbd:

sudo service smbd restart
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  • Great! This almost did it. I also had to add the line server min protocol = NT1, now it is working again. :)
    – w-sky
    Jul 4, 2020 at 2:32
  • Also, for the other way round I needed client min protocol = NT1 to be able to access the shares of the network media player with my Ubuntu notebook.
    – w-sky
    Jul 4, 2020 at 2:38

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