Powershell script to add an IP address to the list of IPs in Remote Desktop firewall rules

Add-Firewall-Ip.ps1

# From cmd:
# powershell.exe -file Add-Firewall-Ip.ps1 -newIp "8.8.8.8"
# From Powershell: 
# & ./Add-Firewall-Ip.ps1 -newIp "8.8.8.8"
param($newIp = "")

$rules = Get-NetFirewallRule -DisplayName "Remote Desktop*"
foreach ($r in $rules) {
  # get list of IPs as an array
  $ips = @(($r | Get-NetFirewallAddressFilter).RemoteAddress)
  Write-Host $r.DisplayName
  Write-Host "Current IPs:"
  Write-Host $ips

  if ($newIp -ne "") {
    #TODO: test for "Any"
    $ips += $newIp
    Set-NetFirewallRule -DisplayName $r.DisplayName -RemoteAddress $ips
    Write-Host "New IPs:"
    Write-Host ($r | Get-NetFirewallAddressFilter).RemoteAddress
  }
  Write-Host ''
}

if ($newIp -ne "") {
  Write-Host "$newIp added"
}