Hi, I have some samba setup on one of my Debian 8 machine. Everything looks fine as I can connect to the shares from the Android tablet and from Windows machine. However when I try to connect from other Debian machines I am getting the following error: session setup failed: NT_STATUS_INVALID_PARAMETER Here is my smb.conf file content: [global] client use spnego = no client ntlmv2 auth = no workgroup = WORKGROUP netbios name = server map to guest = Bad User passdb backend = smbpasswd name resolve order = bcast lmhosts host wins domain master = yes local master = yes preferred master = yes os level = 255 dns proxy = no wins support = yes remote announce = 192.168.2.255 server string = Samba server %v log file = /var/log/samba/samba.log max log size = 1000 security = user encrypt passwords = yes hosts allow = 127. 192.168.2. 192.168.4. interfaces = 127.0.0.1/8 192.168.2.0/50 192.168.4.0/50 [Downloads] path = /home/smbuser/Downloads browsable = yes read only = no valid users = smbuser create mask = 0755 directory mask = 0777 Obviously I have something too much set up or some option missing. I exclude the possibility of the firewall as the other machines are able to connect (Android, Windows). All except the Debians. How should I debug this and what could be wrongly set up? Kind regards, Piotr