Portforward one or more ports to WSL2

README.md

Enable portforwarding for one or more wsl2 ports

chuck these two files in your homedir at

~/Documents/Powershell/Microsoft.PowerShell_profile.ps1
~/Documents/Powershell/bin/Start-Wsl2PortForward.ps1

Protip: Install sudo for windows

winget install gerardog.gsudo

Enable some ports:

sudo Start-Wsl2PortForward.ps1 -Ports 3060,8080,3000

Microsoft.PowerShell_profile.ps1

#
# ~/Documents/Powershell/Microsoft.PowerShell_profile.ps1
#

# get reference to the profile file dir
$HEREDIR = Split-Path -Parent $MyInvocation.MyCommand.Path

# add this directory/bin
$env:PATH += ";${HEREDIR}\bin"

Start-Wsl2PortForward.ps1

#
# ~/Documents/Powershell/bin/Start-Wsl2PortForward.ps1
#

param(
    [Parameter(Mandatory = $true)]
    [string[]]$Ports
)

If (-NOT ([Security.Principal.WindowsPrincipal][Security.Principal.WindowsIdentity]::GetCurrent()).IsInRole([Security.Principal.WindowsBuiltInRole] "Administrator")) {
    # $arguments = "& '" + $myinvocation.mycommand.definition + "'"
    # Start-Process powershell -Verb runAs -ArgumentList $arguments
    Write-Warning "This script needs to be run as an administrator."
    Break
}

$address =wsl -- ip -o -4 -json addr list eth0 `
    | ConvertFrom-Json `
    | %{ $_.addr_info.local } `
    | ?{ $_ }

$found = $address -match '\d{1,3}\.\d{1,3}\.\d{1,3}\.\d{1,3}';

if ( !$found ) {
    Write-Output "The Script Exited, the ip address of WSL 2 cannot be found";
    exit;
}

$address = $matches[0];

Invoke-Expression "netsh interface portproxy reset";

for ( $i = 0; $i -lt $Ports.Length; $i++ ) {
    $port = $Ports[$i];
    # port forward
    Invoke-Expression "netsh interface portproxy add v4tov4 listenport=$port connectport=$port connectaddress=$address";
    # allow firewall access
    Invoke-Expression "netsh advfirewall firewall add rule name='WSL2 Port Proxy ${port}' dir=in action=allow protocol=TCP localport=$port";
}

Invoke-Expression "netsh interface portproxy show v4tov4";