[SOLVED] Synology DiskStation DS216play: Can access Samba share from Windows and Mac, but not Linux

DaneM · 06-05-2017, 05:33 PM

I'm able to access the shares from Windows and Mac computers, and even from non-Linux virtual machines that are on my Linux workstation. However, when I try to access the shares via Linux, I get errors.

From the Ubuntu Unity GUI:

Code:

Oops! Something went wrong.  Unhandled error message: Failed to retrieve share list from server: Connection timed out.

(This message comes up instantly, so I don't think it's actually a timeout.)

From the terminal:

Code:

$ smbclient -L diskstation.local -U username
WARNING: The "syslog" option is deprecated
Enter username's password: 
protocol negotiation failed: NT_STATUS_INVALID_NETWORK_RESPONSE

I've tried this from multiple Linux workstations, with the same results. (Note: actual username has been redacted.)

Fortunately, the Synology device is running Linux, and I'm able to SSH into it. Here's its auto-generated smb.conf, as reported by testparm:

Code:

# Global parameters
[global]
	realm = *
	printcap name = cups
	server min protocol = SMB2_10
	passdb backend = smbpasswd
	security = USER
	winbind enum groups = Yes
	winbind enum users = Yes
	idmap config * : backend = syno
	include = /var/tmp/nginx/smb.netbios.aliases.conf


[Operations]
	comment = "Shared resources for Operations Department"
	path = /volume1/Operations
	guest ok = Yes
	invalid users = nobody,nobody
	read list = nobody,nobody
	read only = No
	valid users = nobody,nobody
	write list = nobody,nobody
	edit synoacl = Yes
	enable recycle bin = Yes
	mediaindex = No
	recycle bin admin only = Yes
	service exist = Yes
	skip smb perm = Yes
	syno fstype = 2
	win share = Yes

Here is the smb.conf on my Linux workstation (which doubles as a file server):

Code:

# Global parameters
[global]
	server string = %h server (Samba, Ubuntu)
	log file = /var/log/samba/log.%m
	max log size = 1000
	syslog = 0
	panic action = /usr/share/samba/panic-action %d
	usershare allow guests = Yes
	client use spnego = No
	map to guest = Bad User
	obey pam restrictions = Yes
	pam password change = Yes
	passwd chat = *Enter\snew\s*\spassword:* %n\n *Retype\snew\s*\spassword:* %n\n *password\supdated\ssuccessfully* .
	passwd program = /usr/bin/passwd %u
	server role = standalone server
	unix password sync = Yes
	dns proxy = No
	idmap config * : backend = tdb


[printers]
	comment = All Printers
	path = /var/spool/samba
	browseable = No
	printable = Yes
	create mask = 0700


[print$]
	comment = Printer Drivers
	path = /var/lib/samba/printers


[operations]
	comment = Temporary storage on workstation
	path = /srv/samba/operations
	create mask = 0660
	directory mask = 0770
	read only = No
	valid users = operations

Any idea why I can't get into the Synology share from Linux, but it's working from other OSes?

Thanks.

DaneM · 06-06-2017, 12:31 PM

I discovered that adding "-m smb3" to the smbclient command fixed it:

Code:

$ smbclient -L diskstation.local -m smb3 -U username
WARNING: The "syslog" option is deprecated
Enter username's password: 
Domain=[DISKSTATION] OS=[] Server=[]

	Sharename       Type      Comment
	---------       ----      -------
	Operations      Disk      Shared resources for Operations Department
	IPC$            IPC       IPC Service ()
Domain=[DISKSTATION] OS=[] Server=[]

	Server               Comment
	---------            -------

	Workgroup            Master
	---------            -------

To make this the default for smbclient and client-side browsing, so that it works system-wide, add this to /etc/samba/smb.conf (and remove any contradictory entries):

Code:

client max protocol = SMB3

To apply this change, reload or restart the Samba service. How this is done will change depending on the distribution you're using. For Ubuntu 16.04 and similar:

Code:

$ sudo service samba reload

Hopefully, this explanation will save someone else a headache. :-)

DaneM · 06-06-2017, 04:48 PM

To mount the share on /mnt/directory:

Code:

$ sudo mount -t cifs //diskstation.local/operations /mnt/directory -o vers=3.0,username=username,password=password

The second "username" should be the actual username; and the second "password" should be the actual password for the share. If "password=password" is omitted, it will prompt for a password. If "username=username" is omitted, username "root" will be assumed (which is probably not what you want). Note that cifs-utils must be installed for this to work.