How to mount synology SMB2 share on ubuntu

Question

I'm having a hard time mount a SMB2 share from my synology to ubuntu server 16.04.

mount.cifs //NAMEOFNAS.domainname.local/Backup /mnt/NAS/ -U USERNAME

results in following error:

mount error(95): Operation not supported

So checking the network share with smbclient results in another error:

 smbclient //NAMEOFNAS.domainname.local/Backup -U username
WARNING: The "syslog" option is deprecated
Enter username's password:
protocol negotiation failed: NT_STATUS_INVALID_NETWORK_RESPONSE

When doing the same but with a share on Windows server, I have no problem whatsoever. Is there something I have to configure in Synology NAS (i noticed it's configured to only use SMB2)?

Here is the output of testparm (only thing I changed was domain and security=user)

   # Global parameters
[global]
        workgroup = AVR
        server string = %h server (Samba, Ubuntu)
        server role = standalone server
        security = USER
        map to guest = Bad User
        obey pam restrictions = Yes
        pam password change = Yes
        passwd program = /usr/bin/passwd %u
        passwd chat = *Enter\snew\s*\spassword:* %n\n *Retype\snew\s*\spassword:* %n\n *password\supdated\ssuccessfully* .
        unix password sync = Yes
        syslog = 0
        log file = /var/log/samba/log.%m
        max log size = 1000
        server max protocol = SMB2
        max protocol = SMB2
        protocol = SMB2
        server min protocol = SMB2
        min protocol = SMB2
        dns proxy = No
        usershare allow guests = Yes
        panic action = /usr/share/samba/panic-action %d
        idmap config * : backend = tdb


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


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

What can I do to mount this share please?

kr, wouter

Solution

I use a PI to mount a DS Share into my nextcloud instance. For that reason I use the following mounting command:

sudo mount.cifs -o username=ds-user,password=pw-of-ds-user,uid=33,gid=33,file_mode=0660,dir_mode=0770,vers=2.1  //IP-of-NAS/share /mountpoint/where/to/mount

I will explain the command

• username and password should be clear I hope
• uid gid are the values for www-date to get it working under nextcloud
• file_mode set the permission for the mounting point
• dir_mode do the same for folders
• vers=2.1 that was the most important to get it working, the version 2.0 was not working for my DS in combination with my Linux
• and of course the the source and destination

So you cannot copy and paste my command you must edit it to your needs, but I think the structure should be clear now.

Comments

[ob2]

Some track : can you try mouting with IP address of the Synology. Also try without the FQDN (e.g. //NAMEOFNAS/Backup). I also guess that correct option for username is -o username=username

[wouter205]

@olivierb2 I did make a mistake in my post, I corrected the syntax of smbclient´. When I try it with -o username=username´ it results in the same `NT_STATUS_INVALID_NETWORK_RESPONSE´ error. Uising the NETBIOS or the IP address does not make a difference.

[wouter205]

Hi, thanks for sharing your input. I needed to change version to `vers=2.0´ in order to get it working. I'll take a look which settings for uid gid will fit me but for now it's working. Thanks!

[wouter205]

Sorry, I was a bit to quick. mount.cifs is working now but I need to add it to /etc/fstab´ to mount it at boot. I added the following line //IPADDRESSNAS/Backup/ /mnt/backup/ cifs credentials=/home/ncadmin/.smbcredentials,file_mode=0660,dir‌​_mode=0770,vers=2.0´ but receive following error in DMESG: `CIFS VFS: Unknown vers= option specified: "2.0"´

[WiKrIe]

I use it for several mounts in fstab with the following syntax: //server/share /mount/to cifs vers=2.1,credentials=/home/user/.smbcreds,uid=1001,gid=1001,‌​iocharset=utf8,rw I dont know why exactly but I thought vers flag must be the first one. could you please try it.

[WiKrIe]

and now I was to quick I simple transfer my bash script into fstab from my PI and then I mount it via mount -a //192.168.178.200/photo /mnt/remote/nas/photo cifs username=username,password=password,uid=33,gid=33,file_mode=‌​0660,dir_mode=0770,v‌​ers=2.1 what kind of Synology did you use? I'm wondering that my synology works with 2.1 and yours with 2.0 ...

[WiKrIe]

I have an idea, normally you would run your cron under root, and maybe your smbcred file is under user xy, so 2 options, first try to insert user and password directly into fstab, if those works create a new smbcred file under root with the account.

[wouter205]

You have good ideas :-). Indeed, with user+pw directly in fstab it worked. Now I have done chown root:root .smbcredentials and mounting works as a charm! Here is the line: //NAMEOFNAS.domain.local/Backup/ /mnt/Backup/ cifs vers=2.0,credentials=/home/admin/.smbcredentials,file_mode=0‌​600,dir_mode=0600 Thanks!

[Denilson Sá Maia]

Note: it is possible to configure Synology DSM to have Maximum SMB protocol = SMB3, which means the vers=2.1 will not be needed anymore.