バック接続のホスト名と IIS を処理するために使用する PowerShell コードを次に示します。ちょっとした作業で、コマンドレットをモジュールに保存して、そのように使用できることに注意してください。
Import-Module WebAdministration
function Add-BackConnectionHostname
{
    <#
    .SYNOPSIS
    Adds the back connection hostnames that will bypass the server loopback check.
    .DESCRIPTION
    Adds the hostname to the list of back connection hostnames that will bypass the server loopback check. Back connection host names  
    can be used to address the problem with IIS sites using Windows Authentication that is described in Microsoft KB896861.
    .EXAMPLE
    Add-BackConnectionHostname mywebsite.mydomain.tld
    .EXAMPLE
    Add-BackConnectionHostname mywebsite1.mydomain.tld, mywebsite2.mydomain.tld
    .PARAMETER Hostname
    The Hostname to add to the back connection hostnames list.
    .LINK
    Remove-BackConnectionHostname
    Get-BackConnectionHostname
    Enable-ServerLoopbackCheck
    Disable-ServerLoopbackCheck
    Get-ServerLoopbackCheck
    "You receive error 401.1 when you browse a Web site that uses Integrated Authentication and is hosted on IIS 5.1 or a later version" (http://support.microsoft.com/en-us/kb/896861)
    #>
    [CmdletBinding(SupportsShouldProcess = $true)]
    param
    (
        [Parameter(ValueFromPipeline = $true, Mandatory = $true)]
        [string] $Hostname
    )
    begin
    {
        $keyPath = "HKLM:\SYSTEM\CurrentControlSet\Control\Lsa\MSV1_0"
        $propertyName = "BackConnectionHostnames"
        $key = Get-Item $keyPath
        $property = $null
        $propertyValues = $null
        if ($key -ne $null)
        {
            $property = Get-ItemProperty $keyPath -Name $propertyName -ErrorAction SilentlyContinue
            if ($property -eq $null)
            {
                $property = New-ItemProperty $keyPath -Name $propertyName -Value $null -PropertyType ([Microsoft.Win32.RegistryValueKind]::MultiString) -ErrorAction Stop
                Write-Verbose "Created the $($propertyName) property."
            }
            if ($property -ne $null)
            {
                $propertyValues = $property.$propertyName
            }
        }
    }
    process
    {
        if ($property -ne $null)
        {
            foreach ($hostNameValue in $Hostname)
            {
                if ([string]::IsNullOrWhiteSpace($hostName) -eq $false -and $propertyValues -notcontains $hostNameValue)
                {
                    $propertyValues += $hostNameValue
                    Write-Verbose "Added $($hostName) to the back connection hostnames."
                }
                else
                {
                    Write-Verbose "Back connection host names already has an entry for $($hostName)."
                }
            }
        }
    }
    end
    {
        if ($propertyValues -ne $null)
        {
            $propertyValues = $propertyValues | ?{ [string]::IsNullOrWhiteSpace($_) -eq $false } | Sort -Unique
            Set-ItemProperty $keyPath -Name $propertyName -Value $propertyValues
        }
    }
}
function Remove-BackConnectionHostname
{
    <#
    .SYNOPSIS
    Removes the hostname from the list of back connection hostnames that will bypass the server loopback check.
    .DESCRIPTION
    Removes the hostname from the list of back connection hostnames that will bypass the server loopback check.
    .EXAMPLE
    Remove-BackConnectionHostname mywebsite.mydomain.tld
    .EXAMPLE
    Remove-BackConnectionHostname mywebsite1.mydomain.tld, mywebsite2.mydomain.tld
    .PARAMETER Hostname
    The Hostname to remove from the back connection hostnames list.
    .LINK
    Add-BackConnectionHostname
    Get-BackConnectionHostname
    Enable-ServerLoopbackCheck
    Disable-ServerLoopbackCheck
    Get-ServerLoopbackCheck
    "You receive error 401.1 when you browse a Web site that uses Integrated Authentication and is hosted on IIS 5.1 or a later version" (http://support.microsoft.com/en-us/kb/896861)
    #>
    [CmdletBinding(SupportsShouldProcess = $true)]
    param
    (
        [Parameter(ValueFromPipeline = $true, Mandatory = $true)]
        [string] $Hostname
    )
    begin
    {
        $keyPath = "HKLM:\SYSTEM\CurrentControlSet\Control\Lsa\MSV1_0"
        $propertyName = "BackConnectionHostnames"
        $key = Get-Item $keyPath
        $property = $null
        $propertyValues = $null
        if ($key -ne $null)
        {
            $property = Get-ItemProperty $keyPath -Name $propertyName -ErrorAction SilentlyContinue
            if ($property -ne $null)
            {
                $propertyValues = $property.$propertyName
            }
            else
            {
                Write-Verbose "The $($propertyName) property was not found."
            }
        }
    }
    process
    {
        if ($property -ne $null)
        {
            foreach ($hostNameValue in $Hostname)
            {
                if ($propertyValues -contains $hostNameValue)
                {
                    $propertyValues = $propertyValues | ? { $_ -ne $hostName }
                    Write-Verbose "Removed $($hostName) from the $($propertyName) property."
                }
                else
                {
                    Write-Verbose "No entry for $($hostName) was found in the $($propertyName) property."
                }
            }
        }
    }
    end
    {
        if ($property -ne $null)
        {
            $propertyValues = $propertyValues | ?{ [string]::IsNullOrWhiteSpace($_) -eq $false } | Sort -Unique
            if ($propertyValues.Length -ne 0)
            {
                Set-ItemProperty $keyPath -Name $propertyName -Value $propertyValues
            }
            else
            {
                Remove-ItemProperty $keyPath -Name $propertyName
                Write-Verbose "No entries remain after removing $($hostName). The $($propertyName) property was removed."
            }
        }
    }
}
function Get-BackConnectionHostname
{
    <#
    .SYNOPSIS
    Gets the list of back connection hostnames that will bypass the server loopback check.
    .DESCRIPTION
    Gets the back connection hostnames that will bypass the server loopback check. Back connection host names can be used to address 
    the problem with IIS sites using Windows Authentication that is described in Microsoft KB896861.
    .EXAMPLE
    Get-BackConnectionHostname
    .LINK
    Add-BackConnectionHostname
    Remove-BackConnectionHostname
    Enable-ServerLoopbackCheck
    Disable-ServerLoopbackCheck
    Get-ServerLoopbackCheck
    "You receive error 401.1 when you browse a Web site that uses Integrated Authentication and is hosted on IIS 5.1 or a later version" (http://support.microsoft.com/en-us/kb/896861)
    #>
    [CmdletBinding(SupportsShouldProcess = $false)]
    param
    (
    )
    begin
    {
        $keyPath = "HKLM:\SYSTEM\CurrentControlSet\Control\Lsa\MSV1_0"
        $propertyName = "BackConnectionHostnames"
        $key = Get-Item $keyPath
        $property = $null
        if ($key -ne $null)
        {
            $property = Get-ItemProperty $keyPath -Name $propertyName -ErrorAction SilentlyContinue
            if ($property -eq $null)
            {
                Write-Verbose "The $($propertyName) property was not found."
            }
        }
    }
    process
    {
        $propertyValues = $null
        if ($property -ne $null)
        {
            $propertyValues = $property.$propertyName
        }
        return $propertyValues
    }
    end
    {
    }
}
function Enable-ServerLoopbackCheck
{
    <#
    .SYNOPSIS
    Enables the server loopback check. Enabled is the normal state for a Windows Server.
    .DESCRIPTION
    Enables the server loopback check. Having the loopback check enabled is the normal state for a Windows Server. Disabling the loopback check can be used to address 
    the problem with IIS sites using Windows Authentication that is described in Microsoft KB896861. It is NOT the preferred method. See the KB article for more details.
    .EXAMPLE
    Enable-ServerLoopbackCheck
    .LINK
    Add-BackConnectionHostname
    Remove-BackConnectionHostname
    Get-BackConnectionHostname
    Enable-ServerLoopbackCheck
    Get-ServerLoopbackCheck
    "You receive error 401.1 when you browse a Web site that uses Integrated Authentication and is hosted on IIS 5.1 or a later version" (http://support.microsoft.com/en-us/kb/896861)
    #>
    [CmdletBinding(SupportsShouldProcess = $true)]
    param
    (
    )
    begin
    {
        $keyPath = "HKLM:\SYSTEM\CurrentControlSet\Control\Lsa"
        $propertyName = "DisableLoopbackCheck"
        $key = Get-Item $keyPath
        $property = $null
        if ($key -ne $null)
        {
            $property = Get-ItemProperty $keyPath -Name $propertyName -ErrorAction SilentlyContinue
            if ($property -eq $null)
            {
                Write-Verbose "The $($propertyName) property was not found."
            }
        }
    }
    process
    {
        if ($property -ne $null)
        {
            Set-ItemProperty $keyPath -Name $propertyName -Value 0
        }
    }
    end
    {
    }
}
function Disable-ServerLoopbackCheck
{
    <#
    .SYNOPSIS
    Disables the server loopback check for all hostnames. Enabled is the normal state for a Windows Server.
    .DESCRIPTION
    Disables the server loopback check for all hostnames. Having the loopback check enabled is the normal state for a Windows Server. Disabling the loopback check can be used 
    to address the problem with IIS sites using Windows Authentication that is described in Microsoft KB896861. It is NOT the preferred method. See the KB article for more details.
    .EXAMPLE
    Disable-ServerLoopbackCheck
    .LINK
    Add-BackConnectionHostname
    Remove-BackConnectionHostname
    Get-BackConnectionHostname
    Enable-ServerLoopbackCheck
    Get-ServerLoopbackCheck
    "You receive error 401.1 when you browse a Web site that uses Integrated Authentication and is hosted on IIS 5.1 or a later version" (http://support.microsoft.com/en-us/kb/896861)
    #>
    [CmdletBinding(SupportsShouldProcess = $true)]
    param
    (
    )
    begin
    {
        $keyPath = "HKLM:\SYSTEM\CurrentControlSet\Control\Lsa"
        $propertyName = "DisableLoopbackCheck"
        $key = Get-Item $keyPath
        $property = $null
        if ($key -ne $null)
        {
            $property = Get-ItemProperty $keyPath -Name $propertyName -ErrorAction SilentlyContinue
            if ($property -eq $null)
            {
                Write-Verbose "The $($propertyName) property was not found."
            }
        }
    }
    process
    {
        if ($property -ne $null)
        {
            Set-ItemProperty $keyPath -Name $propertyName -Value 1
        }
        else
        {
            $property = New-ItemProperty $keyPath -Name $propertyName -PropertyType ([Microsoft.Win32.RegistryValueKind]::DWord) -Value 1
        }
    }
    end
    {
    }
}
function Get-ServerLoopbackCheck
{
    <#
    .SYNOPSIS
    Gets the status of the server loopback check. Enabled is the normal state for a Windows Server.
    .DESCRIPTION
    Gets the status of the server loopback check. Having the loopback check enabled is the normal state for a Windows Server. Disabling the loopback check can be used 
    to address the problem with IIS sites using Windows Authentication that is described in Microsoft KB896861. It is NOT the preferred method. See the KB article for 
    more details.
    .EXAMPLE
    Get-ServerLoopbackCheck
    .LINK
    Add-BackConnectionHostname
    Remove-BackConnectionHostname
    Get-BackConnectionHostname
    Enable-ServerLoopbackCheck
    Disable-ServerLoopbackCheck
    "You receive error 401.1 when you browse a Web site that uses Integrated Authentication and is hosted on IIS 5.1 or a later version" (http://support.microsoft.com/en-us/kb/896861)
    #>
    [CmdletBinding(SupportsShouldProcess = $false)]
    param
    (
    )
    begin
    {
        $keyPath = "HKLM:\SYSTEM\CurrentControlSet\Control\Lsa"
        $propertyName = "DisableLoopbackCheck"
        $key = Get-Item $keyPath
        $property = $null
        if ($key -ne $null)
        {
            $property = Get-ItemProperty $keyPath -Name $propertyName -ErrorAction SilentlyContinue
        }
    }
    process
    {
        $loopbackCheckStatus = "Enabled"
        if ($property -ne $null)
        {
            switch ($property)
            {
                0 { $loopbackCheckStatus = "Enabled" }
                1 { $loopbackCheckStatus = "Disabled" }
                default { $loopbackCheckStatus = "Unknown" }
            }
        }
        return $loopbackCheckStatus
    }
    end
    {
    }
}
function Get-WebsiteHostname
{
    <#
    .SYNOPSIS
    Gets the hostnames for the IP addresses bound to a web site.
    .DESCRIPTION
    Gets the hostnames for the IP addresses bound to a web site. Where a host header exists, the host header is used; otherwise, the IP address is looked up
    in DNS to see if a PTR record exists.
    .EXAMPLE
    Get-WebSiteHostname $webSite
    .EXAMPLE
    Get-WebSiteHostname -Name 'Default Web Site'
    .EXAMPLE
    Get-Website | Get-WebSiteHostname
    .LINK
    Get-Website 
    #>
    [CmdletBinding(SupportsShouldProcess = $false)]
    param
    (
        [Parameter(ValueFromPipeline = $true, ValueFromPipelineByPropertyName = $true, Mandatory = $true)]
        [string] $Name
    )
    process
    {
        $siteHostnames = @()
        foreach ($webSiteName in $Name)
        {
            $bindings = Get-WebBinding -Name $Name
            foreach ($binding in $bindings)
            {
                $bindingInfo = $binding.bindingInformation.Split(':')
                $hostHeader = $bindingInfo[2]
                $bindingInfoAddress = $null
                $isValidIP = [System.Net.IPAddress]::TryParse($bindingInfo[0], [ref] $bindingInfoAddress)
                $siteHostname = $null
                if ($bindingInfo -eq '*')
                {
                    Write-Warning "The $($webSiteName) web site has a binding address set to All Unassigned."
                }
                elseif ([string]::IsNullOrWhiteSpace($hostHeader) -eq $false)
                {
                    $siteHostname = $hostHeader
                    Write-Verbose "The $($webSiteName) web site has a host header set to $($siteHostname)."
                }
                elseif ($isValidIP -eq $true)
                {
                    $siteHostname = (Resolve-DnsName $bindingInfoAddress -DnsOnly PTR -ErrorAction SilentlyContinue).NameHost
                    if ($siteHostname -ne $null)
                    {
                        Write-Verbose "The $($webSiteName) web site has an IP Address $($bindingInfoAddress) that resolves to $($siteHostname)."
                    }
                    else
                    {
                        Write-Warning "The $($webSiteName) web site has an IP Address $($bindingInfoAddress) with no PTR record."
                    }
                }
            }
            if ($siteHostname -ne $null)
            {
                $siteHostnames += $siteHostname
            }
        }
        return $siteHostnames | Sort -Unique
    }
}
Get-Website | ?{ (Get-WebConfiguration -Filter '/system.web/authentication' -PSPath $_.PSPath).mode -eq 'Windows' } | Get-WebsiteHostname | Add-BackConnectionHostname