Common questions

How to disable SMB2?

How to disable SMB2?

To disable SMB2.0:

  1. Click Start, type regedit in the Start Search box.
  2. Locate and then click the following registry subkey:
  3. On the Edit menu, point to New, and then click DWORD Value.
  4. Type SMB2, and then press ENTER.
  5. On the Edit menu, click Modify.
  6. Type 0 (zero), and then click OK.
  7. Exit Registry Editor.

How do I disable LanManServer?


  1. Click Start > Run and type regedit .
  2. Go to the key: HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\LanManServer\
  3. Set the AutoShareWks parameter to 0 . Note: This action does not disable the IPC$ share.

How to disable SMB2.0 on windows 10?

To disable SMBv1 on Windows 8.1 and Windows 10:

  1. In Control Panel, select Programs and Features.
  2. Under Control Panel Home, select Turn Windows features on or off to open the Windows Features box.
  3. In the Windows Features box, scroll down the list, clear the check box for SMB 1.0/CIFS File Sharing Support and select OK.

Should I disable SMB2?

If you’re not using SMB2, you should still run the Microsoft ‘Fix. ‘ SMB2 is on by default in all three versions of Windows that it used on. Even if you don’t use networking at all except to connect to the Internet, you should still turn off SMB2.

What happens if I disable SMBv1?

Disabling SMBv1 without thoroughly testing for SMBv1 traffic in your environment can have unintended consequences, up to and including a complete suspension of all network services, denied access to all resources, and remote authentication failures (like LDAP).

How do I disable default share?

This can be done through the registry.

  1. Start the registry editor.
  2. Move to HKEY_LOCAL_MACHINE\System\CurrentControlSet\Services\LanmanServer\Parameters.
  3. If you are using Workstation create a value (Edit – Add Value) called AutoShareWks (AutoShareServer for server) of type DWORD and press OK.
  4. Close the registry editor.

Is it safe to disable SMB?

Given the history of security flaws in the SMB protocol, the latest being published this week, I would like to disable it. However, the same page that details how to disable it, does not recommend doing so permanently: We recommend that you do not disable SMBv2 or SMBv3.

Should you disable SMBv1?

If you’re not using any of these applications—and you probably aren’t—you should disable SMBv1 on your Windows PC to help protect it from any future attacks on the vulnerable SMBv1 protocol. Even Microsoft recommends disabling this protocol unless you need it.

How to disable oplocks on Windows client PC?

To disable oplocks on a Windows client PC (a Windows PC that accesses an embedded database table hosted on another PC), change or add the following DWord Registry value: • HKEY_LOCAL_MACHINE\\System\\CurrentControlSet\\Services\\MRXSmb\\ParametersOplocksDisabled = 1 Disabling Oplocks on Windows Servers

Is there way to turn off SMB Oplocks?

The EnableOplocks\\OplocksDisabled settings were to do with an index file corruption issue maybe 10 years ago. You cannot turn them off on SMB2 and SMB3, basically Windows 8 and above connecting to Server 2012 or above.

Why do I need an OpLock on my server?

Microsoft’s documentation states “An opportunistic lock (also called an oplock) is a lock placed by a client on a file residing on a server. In most cases, a client requests an oplock so it can cache data locally, thus reducing network traffic and improving apparent response time.

Why do I have oplock on my NAS drive?

Because i’m having issue with windows search indexing a mapped NAS drive, i tried adding the drive to “available off line”, and i can see the error in sync center log seem to oplock related. Well the link seems to say with SMB 2 or 3 oplocks are present, so trying SMB 2 or 3 off see if that helps.

Share this post