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Date:      Wed, 21 Oct 2020 13:57:45 +0200
From:      "Kristof Provost" <kp@FreeBSD.org>
To:        "Patrick M. Hausen" <hausen@punkt.de>
Cc:        "Andrea Venturoli" <ml@netfence.it>, freebsd-net@freebsd.org
Subject:   Re: Help with VNET
Message-ID:  <704712D8-5013-491B-B720-F7E76A7ABFD6@FreeBSD.org>
In-Reply-To: <136B0049-8F69-4CED-91DD-C3F6D9EAC9A5@punkt.de>
References:  <dcbec45d-90e4-fe45-e413-e94799bcffdc@netfence.it> <40361B2B-50AD-474B-A5A7-654F5A958FE2@FreeBSD.org> <799e33d6-c286-3a06-19e1-af87b541645a@netfence.it> <AE406529-7111-4B40-A940-15B060512504@FreeBSD.org> <136B0049-8F69-4CED-91DD-C3F6D9EAC9A5@punkt.de>

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On 21 Oct 2020, at 13:50, Patrick M. Hausen wrote:
> Hi all,
>
>> Am 21.10.2020 um 13:37 schrieb Kristof Provost <kp@FreeBSD.org>:
>>
>> On 21 Oct 2020, at 13:36, Andrea Venturoli wrote:
>>> On 10/21/20 12:20 PM, Kristof Provost wrote:
>>>
>>>> This is your problem. You can’t bridge over wifi interfaces.
>>>> That’s a limitation of station mode wifi.
>>>
>>> I had the suspect...
>>> Is this documented somewhere? Is this a bug or feature?
>>>
>> That’s inherent to how wifi is designed. It’s arguably a bug, but 
>> if so it’s one in the 802.11 spec, not in the implementation.
>
> Well, VMware Workstation and Fusion can do it.
> But they rewrite MAC addresses or some such - it's ugly.
>
Yeah, L2 NAT is the hack to work around that limitation.
But … No. Just … No.

I also don’t think we have a layer-2 NAT solution in FreeBSD. I have a 
vague recollection of OpenBSD doing something with L2 and pf (or 
something that looks like pf on L2), but I can’t immediately find that 
again.

Kristof



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