WSL 2

https://docs.microsoft.com/en-us/windows/wsl/wsl2-install

  • This appears to be a full Linux kernel in a Hyper-V instead of the syscall translation layer that used to exist in v1.

  • To enable, make sure you’re on build 18917 or higher, and run this before installing a distro:

    dism.exe /online /enable-feature /featurename:Microsoft-Windows-Subsystem-Linux /all /norestart
    dism.exe /online /enable-feature /featurename:VirtualMachinePlatform /all /norestart
    wsl --set-default-version 2
    
  • Access servers running inside WSL from the host directly using localhost.

  • Access servers running inside WSL from other computers on the LAN using this script to forward ports (and create firewall exceptions):

    $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=@(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";
    }
    
  • This allows for SSH, and SSH forwarding enables almost every other use case.

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