# Get the IIsWebServer and IIsWebServerSetting WMI objects matching a display name, and combine them into one object
function Get-IIsWeb
{
param (
[string] $displayName = "",
[string] $computer = "localhost"
)

if ($displayName -eq "")
{ $filter = "" }
else
{ $filter = "ServerComment='$displayName'"}

Get-WmiObject -namespace "rootMicrosoftIISv2" -class "IIsWebServerSetting" -filter $filter -computer $computer -authentication 6 | % {
$temp = $_
Get-WmiObject -namespace "rootMicrosoftIISv2" -class "IIsWebServer" -filter "Name='$($_.Name)'" -computer $computer -authentication 6 |
add-member -membertype NoteProperty -name Settings -value $temp -passthru
}
}

# Stop all websites on a given computer that are bound to the specified port, unless they are scoped to a
# host header or IP address
function Stop-WebsiteOnPort
{
[CmdletBinding()]
param (
[Parameter(Mandatory=$true, valuefrompipeline=$true)]
[int] $port,
[Parameter(Position=0)]
[string] $computer = "localhost",
[Parameter()]
[string] $hostName = $null,
[Parameter()]
[string] $ip = $null
)

begin { $websites = Get-IIsWeb -computer $computer }

process
{
# I don't think you can do this filter in WQL
$websites |
? {
( $_.settings.serverbindings | ? {$_.port -eq $port -and $_.Hostname -eq $hostName -and $_.IP -eq $ip} | measure).count -gt 0
} |
% {
$_.stop()
}
}
}