WSL2 Port forwarding port to linux

wsl2-network.ps1

$remoteport = bash.exe -c "ifconfig eth0 | grep 'inet '"
$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=@(80,443,10000,3000,5000);


#[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 Firewall Exception Rules
iex "Remove-NetFireWallRule -DisplayName 'WSL 2 Firewall Unlock' ";

#adding Exception Rules for inbound and outbound Rules
iex "New-NetFireWallRule -DisplayName 'WSL 2 Firewall Unlock' -Direction Outbound -LocalPort $ports_a -Action Allow -Protocol TCP";
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];
  iex "netsh interface portproxy delete v4tov4 listenport=$port listenaddress=$addr";
  iex "netsh interface portproxy add v4tov4 listenport=$port listenaddress=$addr connectport=$port connectaddress=$remoteport";
}

Thanks @jayagami!

As it turned out, I had two WSL installs: Legacy and Ubuntu; i was using Ubuntu but Legacy was set to default with I ran wsl --list. I used wsl --set-default "Ubuntu" and that let wsl hostname -I tell me the correct IP!

wojtow helped me in this comment thread: https://superuser.com/questions/1586386/how-to-find-wsl2-machines-ip-address-from-windows/1603307?noredirect=1#comment2502448_1603307

Thanks to both of you though!

You're welcome, glad you have it solved.

The script did not work for me for as is because I have WSL installed for a non-admin user and not for the admin, so I had to run the wsl bash commands as the user with WSL and then pass the values to a process to run as admin and do the firewall bits... This one works if you are in my situation (the sleep is there just so you can see the rule output before the subprocess shell despawns):

$remoteport = wsl hostname -I
$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=@(3000,5000,8080);

#[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 ",";
Write-Host $ports_a
Write-Host $remoteport
Write-Host $addr

#[Script]
$script = {
  function run([string]$ports_a,[string]$remoteport,[string]$addr){
    #Remove Firewall Exception Rules
    iex \"Remove-NetFireWallRule -DisplayName 'WSL 2 Firewall Unlock'\";
    Write-Host $ports_a
    Write-Host $remoteport
    Write-Host $addr
    #adding Exception Rules for inbound and outbound Rules
    iex \"New-NetFireWallRule -DisplayName 'WSL 2 Firewall Unlock'  -Direction Outbound -LocalPort $ports_a -Action Allow -Protocol TCP\";
    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];
      iex \"netsh interface portproxy delete v4tov4 listenport=$port listenaddress=$addr\";
      iex \"netsh interface portproxy add v4tov4 listenport=$port listenaddress=$addr connectport=$port connectaddress=$remoteport\";
    }
    Start-Sleep -s 25
  }
}
Start-Process -FilePath powershell.exe -ArgumentList "-Command & {$script run '$ports_a' '$remoteport' '$addr'}" -verb RunAs

Thanks, it works for me after run script run "wsl hostname -I " and use the ip in the address for axios

Amazing tips from all guys

where should we run this script?