powershell で X-AspNet-Version ヘッダを削除する ref: http://qiita.com/satoshi_iwashita/items/6751e9b87eae0cf08bba

file0.txt

<httpRuntime enableVersionHeader="false" /> 

file1.xml

    <system.webServer>
        <rewrite>
            <allowedServerVariables>
                <add name="RESPONSE_X-ASPNET-VERSION" />
            </allowedServerVariables>
            <outboundRules>
                <rule name="RESPONSE_X-ASPNET-VERSION">
                    <match serverVariable="RESPONSE_X-ASPNET-VERSION" pattern=".+" />
                    <action type="Rewrite" />
                </rule>
            </outboundRules>
        </rewrite>
    </system.webServer>

file2.txt

# add allowedServerVariables
$asv = Get-WebConfigurationProperty `
       -filter "//rewrite/allowedServerVariables/add"`
       -name name

if ($asv -eq $null)
{
  Add-WebConfigurationProperty `
    -Filter "//rewrite/allowedServerVariables" `
    -PSPath "IIS:\" `
    -Name "Collection" `
    -Value @{name="RESPONSE_X-ASPNET-VERSION"}
}

# add rule
$rule = Get-WebConfigurationProperty `
          -filter "//rewrite/outboundRules/rule[@name='REMOVE_X-ASPNET-VERSION']/match"`
          -name serverVariable

if ($rule -eq $null)
{
  Add-WebConfigurationProperty `
    -Filter "//rewrite/outboundRules" `
    -PSPath "IIS:\" `
    -Name "Collection" `
    -Value @{name="REMOVE_X-ASPNET-VERSION"}

  Set-WebConfiguration `
    -Filter "//rewrite/outboundRules/rule[@name='REMOVE_X-ASPNET-VERSION']/match" `
    -PSPath "IIS:\" `
    -Value @{serverVariable="RESPONSE_X-ASPNET-VERSION";pattern=".+"}

  Set-WebConfiguration `
    -Filter "//rewrite/outboundRules/rule[@name='REMOVE_X-ASPNET-VERSION']/action" `
    -PSPath "IIS:\" `
    -Value @{type="Rewrite"}
}