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Description:  

This setting disables PNRP protocol from advertising the computer or from searching other computers on the
local subnet in the global cloud.

The Peer Name Resolution Protocol (PNRP) allows for distributed resolution of a name to an IPV6 address
and port number. One of the ways in which PNRP bootstraps itself is by using multicast on the same subnet.
That is, PNRP publishes itself on the local subnet, so that other computers can find it when needed.

If you enable this setting, PNRP will not use multicast for bootstrapping. Specifying this registry key will break
scenarios where there is no seed server for bootstrap (such as ad hoc networking scenarios).

If you disable this setting, PNRP will use multicast for bootstrapping on the same subnet.

If this setting is not configured, the protocol will revert to using a public registry key to determine whether it
will publish the computer or will use multicast to search for other computers on the local subnet.

The multicast protocol used for bootstrapping is SSDP (Simple Service Discovery Protocol). The SSDP service
must be enabled (which it is by default) for this policy to have effect.

Supported on: At least Windows XP Professional with SP2.
Turn off Multicast Bootstrap
Description Gpedit Regedit CMD Back VBScript PowerShell Script
Gpedit:   

Please perform the following steps:

Please go to Pearl button (Start) and click on the Search programs and files
For more information about the change from Start to Pearl button click here
Type gpedit.msc and press Enter
In the Group Policy window please navigate to Computer Configuration -> Administrative Templates ->
Network -> Microsoft Peer-to-Peer Networking Services -> Peer Name Resolution Protocol ->
Global Clouds and open Turn off Multicast Bootstrap.
Not Configured -> is the Default state
Enabled -> apply this GPO
Disabled -> this GPO will not be applied

To finish press ok button and close Group Policy window.
Description Gpedit Regedit CMD Up Back VBScript
Type regedit and press ok
Please confirm User Account Control pop-up
Microsoft official disclaimer

Warning Serious problems might occur if you modify the registry incorrectly by using Registry Editor or by
using another method. These problems might require that you reinstall the operating system. Microsoft
cannot guarantee that these problems can be solved. Modify the registry at your own risk.

Note: This registry key is created by Group Policy when this GPO is Enable or Disable. The GPO Default state
is Not Configured -> this registry entry is not present.

Please navigate to HKEY_LOCAL_MACHINE\SOFTWARE\Policies\Microsoft\Peernet\Pnrp\IPv6-Global
and locate DisableMulticastBootstrap registry key
Regedit:          

Please perform the following steps:

Please go to Pearl button (Start) and click on the Search programs and files
For more information about the change from Start to Pearl button click here
Description Gpedit Regedit CMD Up Back VBScript
Double click on DisableMulticastBootstrap and edit the value:

To Enable:
Change the data value with 1

To Disable:
Change the data value with 0

To finish press ok button and close Registry Editor window

Note: Manual editing of this registry key will not be reflected in Group Policy. If you modify this GPO from
Group Policy this registry key will be rewritten.
Description Gpedit Regedit Back CMD VBScript Up
Type cmd, right click on cmd icon under the Programs and click on Run as administrator
Please confirm User Account Control pop-up
Please select, right and copy a registry key from below, then right click on command prompt window
, select Paste and press Enter

Enabled:
REG add "HKLM\SOFTWARE\Policies\Microsoft\Peernet\Pnrp\IPv6-Global" /v DisableMulticastBootstrap /t REG_DWORD /d 1 /f

Disabled:
REG add "HKLM\SOFTWARE\Policies\Microsoft\Peernet\Pnrp\IPv6-Global" /v DisableMulticastBootstrap /t REG_DWORD /d 0 /f

Not Configured:
REG DELETE "HKLM\SOFTWARE\Policies\Microsoft\Peernet\Pnrp\IPv6-Global" /v DisableMulticastBootstrap /f

Note: Manual editing of this registry key will not be reflected in Group Policy. If you modify this GPO from
Group Policy this registry key will be rewritten.
CMD:          

Please perform the following steps:

Please go to Pearl button (Start) and click on the Search programs and files
For more information about the change from Start to Pearl button click here
Description Gpedit Regedit Back CMD VBScript Up
VBScript:          

Const HKEY_LOCAL_MACHINE = &H80000002
strComputer = "."
Set oReg=GetObject("winmgmts:{impersonationLevel=impersonate}!\\" & _
strComputer & "\root\default:StdRegProv")

strKeyPath = "SOFTWARE\Policies\Microsoft\Peernet\Pnrp\IPv6-Global"
oReg.CreateKey HKEY_LOCAL_MACHINE,strKeyPath
strValueName = "DisableMulticastBootstrap"
'Enabled
dwValue = 1
'Disabled
'dwValue = 0
oReg.SetDWORDValue HKEY_LOCAL_MACHINE,strKeyPath,strValueName,dwValue
'Not Configured
'oReg.DeleteValue HKEY_LOCAL_MACHINE,strKeyPath,strValueName
Description Gpedit Regedit Back CMD VBScript Up
PowerShell Script :          

Enabled\Disabled

$RegKey = "HKLM:\SOFTWARE\Policies\Microsoft"
If(Test-Path ($RegKey + "\Peernet"))
{
$RegKey = "HKLM:\SOFTWARE\Policies\Microsoft\Peernet"
If(Test-Path ($RegKey + "\Pnrp"))
{
  $RegKey = "HKLM:\SOFTWARE\Policies\Microsoft\Peernet\Pnrp"
  If(Test-Path ($RegKey + "\IPv6-Global"))
  {
    $RegKey = "HKLM:\SOFTWARE\Policies\Microsoft\Peernet\Pnrp\IPv6-Global"
    ##Enabled
    New-ItemProperty -path $RegKey -name DisableMulticastBootstrap -value 1 -PropertyType DWord -Force
    ##Disabled
    ##New-ItemProperty -path $RegKey -name DisableMulticastBootstrap -value 0 -PropertyType DWord -Force
  }
  else
  {
    New-Item -path $RegKey -name IPv6-Global
    $RegKey = "HKLM:\SOFTWARE\Policies\Microsoft\Peernet\Pnrp\IPv6-Global"
    ##Enabled
    New-ItemProperty -path $RegKey -name DisableMulticastBootstrap -value 1 -PropertyType DWord
    ##Disabled
    ##New-ItemProperty -path $RegKey -name DisableMulticastBootstrap -value 0 -PropertyType DWord
  }
}
else
{
  New-Item -path $RegKey -name Pnrp
  $RegKey = "HKLM:\SOFTWARE\Policies\Microsoft\Peernet\Pnrp"
  New-Item -path $RegKey -name IPv6-Global
  $RegKey = "HKLM:\SOFTWARE\Policies\Microsoft\Peernet\Pnrp\IPv6-Global"
  ##Enabled
  New-ItemProperty -path $RegKey -name DisableMulticastBootstrap -value 1 -PropertyType DWord
  ##Disabled
  ##New-ItemProperty -path $RegKey -name DisableMulticastBootstrap -value 0 -PropertyType DWord
}
}
else
{
 New-Item -path $RegKey -name Peernet
 $RegKey = "HKLM:\SOFTWARE\Policies\Microsoft\Peernet"
 New-Item -path $RegKey -name Pnrp
 $RegKey = "HKLM:\SOFTWARE\Policies\Microsoft\Peernet\Pnrp"
 New-Item -path $RegKey -name IPv6-Global
 $RegKey = "HKLM:\SOFTWARE\Policies\Microsoft\Peernet\Pnrp\IPv6-Global"
 ##Enabled
 New-ItemProperty -path $RegKey -name DisableMulticastBootstrap -value 1 -PropertyType DWord
 ##Disabled
 ##New-ItemProperty -path $RegKey -name DisableMulticastBootstrap -value 0 -PropertyType DWord
}

Not Configured

$RegKey = "HKLM:\SOFTWARE\Policies\Microsoft"
Remove-ItemProperty -Path($RegKey + "\Peernet\Pnrp\IPv6-Global") -name DisableMulticastBootstrap
If( (Get-Item -Path($RegKey + "\Peernet\Pnrp\IPv6-Global")).ValueCount -eq 0 -and (Get-Item -Path($RegKey + "\Peernet\Pnrp\IPv6-Global")).SubKeyCount -eq 0)
{
Remove-Item -Path($RegKey + "\Peernet\Pnrp\IPv6-Global")
If( (Get-Item -Path($RegKey + "\Peernet\Pnrp")).ValueCount -eq 0 -and (Get-Item -Path($RegKey + "\Peernet\Pnrp")).SubKeyCount -eq 0)
{
 Remove-Item -Path($RegKey + "\Peernet\Pnrp")
 If( (Get-Item -Path($RegKey + "\Peernet")).ValueCount -eq 0 -and (Get-Item -Path($RegKey + "\Peernet")).SubKeyCount -eq 0)
 {
  Remove-Item -Path($RegKey + "\Peernet")
 }
}
}
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