Port forwarding to WSL2 from windows host

wsl_port_forward.ps1

<#
  .SYNOPSIS
  Port forwarding from Windows Host environment to WSL2 environment.

  .DESCRIPTION
  A simple wrapper windows command 'netsh'.
  Requires administrator privileges to run.

  .PARAMETER FromPort
  Specifies the port in the Windows Host environment for port forwarding.
  (default: 8080)

  .PARAMETER ToPort
  Specifies the port of the WSL2 environment to be port forwarded.
  (default: 8080)

  .INPUTS
  None.

  .OUTPUTS
  None.

  .EXAMPLE
  PS> .\wsl_port_forward.ps1 -fromport 8080 -toport 3000
#>
Param($FromPort=8080, $ToPort=8080)

# get WSL2 ip addr
$WSL2_IPV4=bash -c 'ip address show eth0 | awk ''/inet / {print \$2}'' | awk -F / ''{print \$1}'''
$WSL2_IPV4=$WSL2_IPV4.TrimEnd()

# get windows host ip addr
$HOST_IPV4=get-netipaddress | where{$_.AddressFamily -eq "IPv4" -and $_.IPAddress -match "192.168." -and $_.PrefixOrigin -eq "Dhcp"} | select -ExpandProperty IPAddress
$HOST_IPV4=$HOST_IPV4.TrimEnd()

# add new portproxy
netsh interface portproxy add v4tov4 listenaddress=$HOST_IPV4 listenport=$FromPort connectaddress=$WSL2_IPV4 connectport=$ToPort

echo "portproxy is enabled(From: ${HOST_IPV4}:$FromPort To: ${WSL2_IPV4}:$ToPort)"
pause

# remove port portproxy
netsh interface portproxy delete v4tov4 listenport=$ToPort listenaddress=$HOST_IPV4
echo "portproxy is disabled"
echo "check current forwarding list: netsh interface portproxy show all"