If you haven’t disabled SMBv1 everywhere, on every PC, NAS, server, you should.



After disabling SMBv1 on a Synology NAS with DSM 6.1.5-15254 Update 1, I could no longer mount the shares from Linux. On Linux Mint 18.3 with KDE, you can’t select SMBv2 or 3 in the Dolphin or Smb4K GUI (yet) so you have to mount it from the cli.

Both smbclient and mount worked when I specified the SMB version. Note that both commands will prompt you for your password.

user1@lmint ~ $ sudo mount -t cifs // /home/user1/Synology -o username=user1,vers=2.0,sec=ntlmv2

user1@lmint ~ $ smbclient ‘//’ -m SMB2