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Disable LoopBack Script - SharePoint

A friend of mine and I were discussing the topic of Disabling LoopBack and which is the better route to go when it comes to creating a new SharePoint 2013 farm.

My perspective, when possible, abide by Microsoft’s recommendations. In this case Microsoft seems to take the classic “it depends” stance on disabling ye old loopback.

Being me, I asked my self why not have both? After all I’m sure PowerShell could help out here. To those who know me or have read this blog; I’m not a developer and

it probably shows in various scripts. That said, the following script does accomplish the desired result of one script allowing you to choose if you are going to take the

“Developer” route and disable the loopback, or take the “Admin” route and call out your exceptions. If you are a new SharePoint Admin this might be useful, if you arent

new to SharePoint then I’m sure you’ve already clicked off of this post a few lines back…lol

#Disable LoopBack Or Enter Back Connection Name

#Use this to avoid disabling loopback -

#Define in CSV format your FDQNs

$DisableLoopBack = $null

Do {$DisableLoopBack = (Read-Host "Would you like to disable loopback? (Yes / No)") }

Until ($DisableLoopBack -eq "Yes" -or $DisableLoopBack -eq "No")

If ($DisableLoopBack -eq "Yes"){

Write-Warning "According To Microsoft You Should NOT disable loopback, HOWEVER it's a common development practice."

New-ItemProperty HKLM:\System\CurrentControlSet\Control\Lsa -Name "DisableLoopbackCheck" -value "1" -PropertyType dword -Force | Out-Null

IISReset /noforce


Elseif ($DisableLoopBack -eq "No"){

$HostNames = @()


$More = $null

Do {

Write-Host "Here are the host names that will be added to the BackConnectionHostNames Exception List"

Write-Host $HostNames -ForegroundColor Green

$More = (Read-Host "Would you like to add others? (Yes / No)")

If ($More -eq "Yes"){

$AddHost = (Read-Host "Enter FQDN Host Name")


Write-Host "$AddHost has been added to the list of names above" -ForegroundColor Green

$More = (Read-Host "Would you like to add others? (Yes / No)")



Until ($More -eq "No")

New-ItemProperty HKLM:\SYSTEM\CurrentControlSet\Control\Lsa\MSV1_0 -Name "BackConnectionHostNames" -Value $HostNames -PropertyType MultiString

IISReset /noforce


Print | posted on Thursday, May 29, 2014 4:05 PM | Filed Under [ SharePoint 2010 Powershell SharePoint 2013 ]


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