script and config file for configuring WSL 2 portproxy rules

wsl-port-proxy.json

{
  "ports": [3000, 5173, 8000]
}

wsl-portproxy.ps1

$path = Split-Path($MyInvocation.MyCommand.Path)
$logfile = "wsl-portproxy.log"
$jsonfile = "wsl-portproxy.json"

Start-Transcript -Path "$path\$logfile" -Append
Write-Output ""

# Default ports:
#    3000 - create-react-app
#    5173 - Vite/Vue
$config = @{
    ports = 3000, 5173
}

# Attempt to load ports from a $path\wsl-portproxy.json file
if ([System.IO.File]::Exists($jsonfile)) {
    try {
        $config = Get-Content $path\$jsonfile | ConvertFrom-Json
        Write-Output "Reading ports from $path\$jsonfile"
    }
    catch {
        Write-Warning "Unable to read $jsonfile"
        Write-Error $_
        Write-Output "Opening default ports: $($config.ports)"
    }
}
else {
    Write-Output "No file found at $jsonfile"
    Write-Output "Opening default ports: $($config.ports)"
}

Write-Output "Listing current PortProxy ports"
Invoke-Expression "netsh interface portproxy show all"


# Reset the entire interface:
# Trying this since I was still seeing hanging errors with the more specific option
Write-Output "Resetting PortProxy Interface"
Invoke-Expression "netsh interface portproxy reset"
Start-Sleep -Seconds 2


foreach ($port in $config.ports) {
    # If this doesn't work, try the general reset above
    # Write-Output     "Removing any existing mappings for port $port"
    # Invoke-Expression "netsh interface portproxy delete v4tov4 listenaddress=0.0.0.0 listenport=$port"

    # # Probably not necessary?
    # Start-Sleep -Seconds 2

    Write-Output "Opening port $port"
    Invoke-Expression "netsh interface portproxy add v4tov4 listenaddress=0.0.0.0 listenport=$port connectaddress=localhost"
}

Invoke-Expression "netsh interface portproxy show all"

Stop-Transcript