I just upgraded my file server from 16.04 to 20.04 and everything seems to be working except for my SMB mounts on my Ubuntu computer. I can access the SMB shares on my Windows computer but on my Ubuntu 18.04 computer I can't get the shares mounted in fstab.
If I mount the shares from the command line (command below) it is mounted just fine.
sudo mount -t cifs -o username=username,vers=3.0 //192.168.1.116/Share /mnt/Share/
However when I try to mount the share in fstab (command below) the smb share is not mounted.
//192.168.1.116/Share /mnt/Share cifs credentials=/home/user/.smbcredentials,vers=3.0,iocharset=utf8,sec=ntlmssp 0 0
After doing a
sudo mount -a and trying a
ls I get:
ls: cannot access 'Share': Operation not supported
and when I do a
smbclient -L //192.168.1.116 I get:
protocol negotiation failed: NT_STATUS_INVALID_NETWORK_RESPONSE
When I do a
sudo mount -t cifs -o credentials=/home/user/.smbcredentials,vers=3.0,iocharset=utf8,sec=ntlmssp //192.168.1.116/Share /mnt/Share/
The SMB share is mounted properly.
When I do a
smbclient -L //192.168.1.116 -d 0
I get the same result:
protocol negotiation failed: NT_STATUS_INVALID_NETWORK_RESPONSE.
dmesg -t | grep -e CIFS returns:
CIFS VFS: cifs_mount failed w/return code = -95
When I check dmesg with the debug turned on I get a lot of:
/build/linux-Dh1oQA/linux-4.4.0/fs/cifs/cifsfs.c: CIFS VFS: in cifs_statfs as Xid: 9405245 with uid: 1000
/build/linux-Dh1oQA/linux-4.4.0/fs/cifs/cifsfs.c: CIFS VFS: leaving cifs_statfs (xid = 9405245) rc = -95
/build/linux-Dh1oQA/linux-4.4.0/fs/cifs/inode.c: CIFS VFS: in cifs_revalidate_dentry_attr as Xid: 9405247 with uid: 1000
/build/linux-Dh1oQA/linux-4.4.0/fs/cifs/inode.c: CIFS VFS: leaving cifs_revalidate_dentry_attr (xid = 9405247) rc = -95