Why can't I access shared folders with SMBv1 after updating to QTS 5.0.1 or QuTS hero 5.0.1?
Applicable Products
- QTS 4.2.6 and later
- QuTS hero h4.5.4 and later
Root Cause
SMB version 1 has known security vulnerabilities and may expose your device to malicious attacks. To address the security vulnerabilities in SMB version 1, all QNAP NAS operating systems had their SMB settings changed through firmware updates. The firmware updates changed the lowest SMB version to version 2 by default. If you adopted these firmware updates, then your existing SMB version 1 connections may have been interrupted and some file resources may have no longer been accessible. QNAP does not recommend re-enabling SMB version 1 as a workaround. Instead, update your other Windows devices to support SMB version 2 or 3. Despite the security risks, however, some users may still need to re-enable SMB version 1.
Resolution
The following steps explain how to enable SMB version 1. There are two possible methods:
Method 1: Control Panel
- Log in to you NAS as an administrator.
- Open Control Panel and go to Network & File Services > Win/Mac/NFS/WebDAV > Microsoft Networking.
- Go to Advanced Settings.
- Go to Lowest SMB version and select SMBv1.
Method 2: SSH (for QTS 4.2.6/4.3.3/4.3.4)
- Open a Secure Shell (SSH) connection to your QNAP NAS.
For details, see How do I access my QNAP NAS using SSH? - Enter the following commands in the terminal:
[~] # setcfg -e Samba 'Min Protocol' [~] # setcfg -e global 'min protocol' -f /etc/config/smb.conf [~] # /etc/init.d/smb.sh restart
Further Reading
- How do I access my QNAP NAS using SSH?
- How to disable SMB1 or NetBIOS in macOS
- Why Windows and QTS display error message about login failures whenever I access NAS shared folder from Windows via SMB?
- Tracking the logging connections in NAS
- After using the command line to disable SMBv1 and enable SMBv2/v3 on Windows Server 2012, I can't connect to my NAS via SMB. How can I resolve this problem?
