WSL NAT FIX

wsl-nat-fix.ps1

# Add to -> Task Scheduler

# WSL 2 TPC NETWORK FORWARDING
# Introduction

# With the introduction of WSL 2 Beta, Microsoft has made changes to the system architecture.
# The changes include changing from the default bridged network adapter to a hyper-v virtual network adapter.
# The implementation was not completed during the launch of the beta program. This makes accessing of network resources under WSL 2 complex.
# The work around is to forward the TCP ports of WSL 2 services to the host OS.
# The virtual adapter on WSL 2 machine changes it's ip address during reboot which makes it tough to implement a run once solution.
# Also a side note, windows firewall will block the redirected port.

# The work around is to use a script that does :

# Get Ip Address of WSL 2 machine
# Remove previous port forwarding rules
# Add port Forwarding rules
# Remove previously added firewall rules
# Add new Firewall Rules
# Configuration

# The script must be run at login ,under highest privileges to work, and Powershell must be allowed to run external sources.

# PowerShell Configuration

# Enable power shell to run external scripts, run the command below in power shell with administrative privileges.

# How To:
# Go to search, search for task scheduler. In the actions menu on the right, click on create task.
# Enter Name, go to triggers tab. Create a new trigger, with a begin task as you login, set delay to 10s.
# Go to the actions and add the script. If you are using Laptop, go to settings and enable run on power.

# https://github.com/microsoft/WSL/issues/4150

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# #############################################################################################################################################


# bash.exe -c "sudo service ssh start"
# bash.exe -c "eval $(ssh-agent -s)"
# bash.exe -c "ssh-add ~/.ssh/id_rsa"

$distro = "Ubuntu-20.04"

$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=@(22,80,443,2222);


#[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";
}

wsl.exe -d $distro -u root bash -c "service ssh start"
wsl.exe -d $distro -u wrx bash -c "eval $(ssh-agent -s)"
wsl.exe -d $distro -u wrx bash -c "ssh-add ~/.ssh/id_rsa"