Unable to enable Net BIOS over TCP/IP in PowerShell

Hi MrJezbo. Welcome to the Tenforums @MrJezbo

When did this start?

Have you made any equipment changes or added anything new.

Not sure exactly what you have done / changed so maybe some of this is a repeat.

Disable third party AV's.

I think I would start with a Network reset on any boxes you've changed. Start > Settings > Network and Internet > scroll down right side, Network reset. This may require installation of customized communication packages if you use like VPN's.

I would also issue these four commands as resets.

Run the following four bolded commands. Use a Command Prompt(admin) or Powershell(admin)

Do not key in info in brackets, there for your information.

ipconfig /flushdns (Clear the dns cache)
nbtstat -RR (release and refresh NetBIOS names)
netsh int ip reset (reset ip settings)
netsh winsock reset (Reset Winsock Catalog)

Any chance your NAS is older and requires SMB 1.0 to work?

Are you sure they are all on Private network. Windows can default to public.

This is the forum tutorial on sharing. Step 3 in Option 1 is important.

Share Files and Folders Over a Network in Windows 10


Ken

Hey Mrjezbo,
Check your Win10 PC's > Windows Services and make sure the following two services are Running and their startup type set to Automatic Delay

Function Discovery Provider Host - Running | Automatic Delay
Function Discovery Resource Publication - Running | Automatic Delay

See this tutorial - Share Files and Folders Over a Network in Windows 10 | Windows 10 Tutorials

Note: With the two Function Discovery Services startup type set to Automatic Delay it can take a minute for shares to show in File Explorer > Network

You might also want to check the following services are running and the startup type set accordingly ...

Dns Client - Running | Automatic
TCP/IP NetBIOS Helper - Running | Manual (may need to change to Automatic)
Workstation - Running | Automatic


If your NAS can be set to SMBv3, then you should not need to have SMBv1 installed/enabled on your Win10 PC's.

Note: If you do need/want SMBv1 - Enable or Disable SMB1 File Sharing Protocol in Windows | Windows 10 Tutorials

K ...

If you would like to use SMBv3 with your NAS ...

1. Open regedit and navigate to the following registry location ...
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\LanmanWorkstation\Parameters

2. See if you have the key AllowInsecureGuestAuth : 0

3. IF you do you can either delete the key AllowInsecureGuestAuth or set it to 1

4. When done reboot PC ... try setting NAS to SMBv3 and hopefully SMBv3 will work.

BTW ... If you still having issue's with NetBIOS over TCP/IP ... you can check it in the registry.

1. Open Regedit and navigate to the following location
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\NetBT\Parameters\Interfaces
2. Under Interfaces you'll see a number of Tcpip_{xxxx-xxxx-xxxx-xxxx}
3. Check each one for NetbiosOptions = 0

Note: Valid values for NetbiosOptions > Default is 0 ... Enabled is 1 ... Disabled is 2


USE AT YOUR OWN RISK !!!
... Open PowerShell as Admin ...

1. This will list all your adapters

Get-NetAdapter -Name "*" | Format-List -Property "Name", "InterfaceDescription", "InstanceID"

2. Take the InstanceID of the adpater you're using and replace {InstanceIDGoesHere} with your {InstanceID} including curly brackets ... Run the following command to CHECK NetBiosOptions for the adapter ...

Get-ItemProperty -Path "HKLM:SYSTEM\CurrentControlSet\Services\NetBT\Parameters\Interfaces\Tcpip_{InstanceIDGoesHere}" -Name NetbiosOptions

3.Take the InstanceID of the adpater you're using and replace {InstanceIDGoesHere} with your {InstanceID} including curly brackets ... Run the following command to SET NetBiosOptions for the adapter ...

Set-ItemProperty -Path "HKLM:SYSTEM\CurrentControlSet\Services\NetBT\Parameters\Interfaces\Tcpip_{InstanceIDGoesHere}" NetbiosOptions -Type DWORD -Value 0 –Force


Example:

I ran the commands you suggested and still no luck. However, should the value be changed from 0 to 1 in the last command?

You can try 1 ... I was using 0 as that's the default setting. Long as it's not 2, it should be enabled.

Note: I see you're using a VPN and I don't know if that has anything to do with the issue or not.


EDIT:
If you want to see the what the NetboisOptions are set to on ALL your adapters ...

Open PowerShell as Admin

Get-ChildItem -Path HKLM:SYSTEM\CurrentControlSet\Services\NetBT\Parameters\Interfaces -Recurse