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Re: Warning: If you use adb or stunnel & if you enable Hyper-V (e.g., WSL, Docker, VMs, etc.) you will be sorry

Cross-posted to 3 groups.

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Marion, 2025-05-18 02:25:

> On Sat, 17 May 2025 08:54:23 +0200, Arno Welzel wrote :
> 
> 
>>> If people need to use Hyper-V, then they *must* reserve ports they want to
>>> use *ahead* of time since Winnat reservation is essentially random (AFAIK).
>>
>> You can also just disable the NAT and only use direct connections in the
>> virtual machines in Hyper-V. This is why I suggested this *instead* of
>> using WSL2 if you need a Linux VM in Windows - because WSL2 does not
>> work without NAT.
> 
> I thank you for that information which will help others. 
> 
> Personally, I can't even spell Hyper-V as I have no idea what it is. 
> All I know is I have to enable it whenever a program asks me to do that.
> Looking up what you said (which requires more understanding than I own),
> apparently Hyper-V is Microsoft's name for its virtual machine platform.
> 

Exactly - Hyper-V is the name of Microsofts virtual machine solution -
similar to VMware, QEMU etc.. You can create a virtual machine inside
Windows and run a second computer inside that - like Linux or another
Windows installation.

Before Hyper-V there was "VirtualPC" which Microsoft acquired many years
ago to provide the "Windows XP mode" in Windows 7 - in fact a virtual PC
running Windows XP with a special license inside Windows 7.

> For that virtual machine to connect to the Internet, apparently it needs a
> port to go through in order to get outside to the Internet. NAT takes care
> of the pipe of the virtual machine port on one end and the real machine
> port on the other end, apparently. 

You can also just use the network card directly using a bridge driver.

> Apparently your reference to "direct connections" is a bridge of some sort. 
> That bridge has its own IP address, apparently, just like another computer.

Exactly. However WSL2 does not support bridging for security reasons.

> So, I guess, the VM traffic goes out that bridge directly to the router.
> Apparently that bridge isn't a physical device but a software construct.

Exactly. But for the network it makes no difference, where the traffic
comes from - the VM will still be seen as an individual computer.

[...]
> If so, is my understanding correct that this virtual switch then handles
> the task of bridging the network traffic between my VM and the physical
> network?

Yes.


-- 
Arno Welzel
https://arnowelzel.de

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Warning: If you use adb or stunnel & if you enable Hyper-V (e.g., WSL, Docker, VMs, etc.) you will be sorry Marion <marion@facts.com> - 2025-05-06 22:24 +0000
  Re: Warning: If you use adb or stunnel & if you enable Hyper-V (e.g., WSL, Docker, VMs, etc.) you will be sorry Arno Welzel <usenet@arnowelzel.de> - 2025-05-09 09:05 +0200
    Re: Warning: If you use adb or stunnel & if you enable Hyper-V (e.g., WSL, Docker, VMs, etc.) you will be sorry Marion <marion@facts.com> - 2025-05-09 10:12 +0000
      Re: Warning: If you use adb or stunnel & if you enable Hyper-V (e.g., WSL, Docker, VMs, etc.) you will be sorry Arno Welzel <usenet@arnowelzel.de> - 2025-05-16 19:03 +0200
        Re: Warning: If you use adb or stunnel & if you enable Hyper-V (e.g., WSL, Docker, VMs, etc.) you will be sorry Marion <marion@facts.com> - 2025-05-16 19:58 +0000
          Re: Warning: If you use adb or stunnel & if you enable Hyper-V (e.g., WSL, Docker, VMs, etc.) you will be sorry Arno Welzel <usenet@arnowelzel.de> - 2025-05-17 08:54 +0200
            Re: Warning: If you use adb or stunnel & if you enable Hyper-V (e.g., WSL, Docker, VMs, etc.) you will be sorry Marion <marion@facts.com> - 2025-05-18 00:25 +0000
              Re: Warning: If you use adb or stunnel & if you enable Hyper-V (e.g., WSL, Docker, VMs, etc.) you will be sorry Arno Welzel <usenet@arnowelzel.de> - 2025-05-18 14:49 +0200
                Re: Warning: If you use adb or stunnel & if you enable Hyper-V (e.g., WSL, Docker, VMs, etc.) you will be sorry Marion <marion@facts.com> - 2025-05-20 20:01 +0000
                Re: Warning: If you use adb or stunnel & if you enable Hyper-V (e.g., WSL, Docker, VMs, etc.) you will be sorry Marion <marion@facts.com> - 2025-05-21 04:13 +0000
                Re: Warning: If you use adb or stunnel & if you enable Hyper-V (e.g., WSL, Docker, VMs, etc.) you will be sorry Marion <marion@facts.com> - 2025-05-21 04:21 +0000
                Re: Warning: If you use adb or stunnel & if you enable Hyper-V (e.g., WSL, Docker, VMs, etc.) you will be sorry Andy Burns <usenet@andyburns.uk> - 2025-05-21 07:57 +0100

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