WSL2 Port Forwarding

# NEEDS TO BE RUN AS ADMIN
# If ran as a powershell script, you will need to run this first:
# Set-ExecutionPolicy -ExecutionPolicy Bypass -Scope Process

# [CONFIGURATION]

# Ensure WSL2 container is started and SSH is running
wsl sudo /etc/init.d/ssh start

# Ports to be forwarded
$ports = @(22);
#Example
#$ports = @(22) + @(6543,6544) + @(6800..6810);


# Change $addr to restrict connections to a particular interface IP
$listen_addr = '0.0.0.0';

# [RUNTIME]
$wsl_addr = (wsl hostname -I).trim()

if(!$wsl_addr){
  echo "Cannot determine IP of WSL2 instance";
  exit;
}
Write-Host "WSL IP: $wsl_addr"

$rule_name = "WSL2 Forwarding"

# Remove old firewall rules
Write-Host "Removing old firewall rules"
Remove-NetFireWallRule -DisplayName $rule_name

# Add new firewall rules
Write-Host "Add firewall rules"
New-NetFireWallRule -DisplayName $rule_name -Direction Outbound -LocalPort $ports_all -Action Allow -Protocol TCP
New-NetFireWallRule -DisplayName $rule_name -Direction Inbound -LocalPort $ports_all -Action Allow -Protocol TCP

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

Removed default ports, added some verbose info about the running commands