Is there a way to configure the current samba to be able to display workgroups and/or homegroups?
SMB1 disabled -- no workgroup available
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First, there is no such thing as a HomeGroup in Linux, MacOS, or Windows starting with Win10.
Second, if you are talking about that specific error when running smbclient you would need to enable SMB1 ( Samba calls it NT1 ) on the client side in /etc/samba/smb.conf. Right under the workgroup = WORKGROUP line add this one:
client min protocol = NT1
Of course the server you are trying to connect to must have SMB1 enabled on its side. If you kept your Win10 machine up to date it is disabled so you will have to enable it there. If the server is running Ubuntu 20 or anything with the same version of samba you would have to edit smb.conf on that machine and add:
server min protocol = NT1
Then restart samba:
sudo service smbd restart sudo service nmbd restart
If you don't do that on the server you will likely get a
protocol negotiation failed: error.
That will probably eliminate the SMB1 error message. Whether you can "discover" all the workgroups and hosts in Nautilus is another matter. If you have to turn the clock back to SMB1 days you need to follow the rules set at that era ... name resolve order, host name length restrictions, etc ...