wsl2-forward-ports.ps1

#Elevated Shell
param([switch]$Elevated)
function Check-Admin {
  $currentUser = New-Object Security.Principal.WindowsPrincipal $([Security.Principal.WindowsIdentity]::GetCurrent())
  $currentUser.IsInRole([Security.Principal.WindowsBuiltinRole]::Administrator)
}
if ((Check-Admin) -eq $false)  {
  if ($elevated) {
    # could not elevate, quit
  } else {
    Start-Process powershell.exe -Verb RunAs -ArgumentList ('-noprofile -noexit -file "{0}" -elevated' -f ($myinvocation.MyCommand.Definition))
  }
  exit
}

$remoteport = wsl.exe /bin/ash -c "ifconfig eth0 | grep 'inet '"
Write-Host $remoteport
$found = $remoteport -match '\d{1,3}\.\d{1,3}\.\d{1,3}\.\d{1,3}';

if( $found ){
  $remoteport = $matches[0];
} else{
  echo "The Script Exited, the ip address of WSL 2 cannot be found";
  exit;
}

#[Ports]
#All the ports you want to forward separated by coma
$ports=@(9000);

#[Static ip]
#You can change the addr to your ip config to listen to a specific address
$addr='0.0.0.0';
$ports_a = $ports -join ",";

#remove blank output
$iex_supress

#Remove Firewall Exception Rules
$iex_supress = iex "Remove-NetFireWallRule -DisplayName 'WSL 2 Firewall Unlock' ";

#adding Exception Rules for inbound and outbound Rules
$iex_supress = iex "New-NetFireWallRule -DisplayName 'WSL 2 Firewall Unlock' -Direction Outbound -LocalPort $ports_a -Action Allow -Protocol TCP";
$iex_supress = iex "New-NetFireWallRule -DisplayName 'WSL 2 Firewall Unlock' -Direction Inbound -LocalPort $ports_a -Action Allow -Protocol TCP";

for( $i = 0; $i -lt $ports.length; $i++ ){
  $port = $ports[$i];
  Write-Host $port
  $iex_supress = iex "netsh interface portproxy delete v4tov4 listenport=$port listenaddress=$addr";
  $iex_supress = iex "netsh interface portproxy add v4tov4 listenport=$port listenaddress=$addr connectport=$port connectaddress=$remoteport";
}