服务器：Debian 8，客户端：一些 Windows 和一些 Xubuntu 16.04
由于我将一个 Xubuntu Client 更新到 4.13.0-26，我无法挂载 samba 共享。
[20390.135208] No dialect specified on mount. Default has changed to a more secure dialect, SMB2.1 or later (e.g. SMB3), from CIFS (SMB1). To use the less secure SMB1 dialect to access old servers which do not support SMB3 (or SMB2.1) specify vers=1.0 on mount.
[20390.161744] CIFS VFS: protocol revalidation - security settings mismatch
[20390.162553] CIFS VFS: session ffffa06a57c23a00 has no tcon available for a dfs referral request …