From owner-freebsd-net@freebsd.org  Wed Oct 21 11:57:48 2020
Return-Path: <owner-freebsd-net@freebsd.org>
Delivered-To: freebsd-net@mailman.nyi.freebsd.org
Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2610:1c1:1:606c::19:1])
 by mailman.nyi.freebsd.org (Postfix) with ESMTP id 193DA449F4B
 for <freebsd-net@mailman.nyi.freebsd.org>;
 Wed, 21 Oct 2020 11:57:48 +0000 (UTC) (envelope-from kp@FreeBSD.org)
Received: from smtp.freebsd.org (smtp.freebsd.org [96.47.72.83])
 (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits)
 key-exchange X25519 server-signature RSA-PSS (4096 bits) server-digest SHA256
 client-signature RSA-PSS (4096 bits) client-digest SHA256)
 (Client CN "smtp.freebsd.org",
 Issuer "Let's Encrypt Authority X3" (verified OK))
 by mx1.freebsd.org (Postfix) with ESMTPS id 4CGTWv6rWvz4FQX;
 Wed, 21 Oct 2020 11:57:47 +0000 (UTC) (envelope-from kp@FreeBSD.org)
Received: from venus.codepro.be (venus.codepro.be [5.9.86.228])
 (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits))
 (Client CN "mx1.codepro.be", Issuer "Let's Encrypt Authority X3" (verified OK))
 (Authenticated sender: kp)
 by smtp.freebsd.org (Postfix) with ESMTPSA id B40D62CC65;
 Wed, 21 Oct 2020 11:57:47 +0000 (UTC) (envelope-from kp@FreeBSD.org)
Received: by venus.codepro.be (Postfix, authenticated sender kp) id 6DC0624157;
 Wed, 21 Oct 2020 13:57:46 +0200 (CEST)
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
Date: Wed, 21 Oct 2020 13:57:45 +0200
X-Mailer: MailMate (1.13.2r5673)
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>
MIME-Version: 1.0
Content-Type: text/plain; charset="UTF-8"; format=flowed
Content-Transfer-Encoding: 8bit
X-BeenThere: freebsd-net@freebsd.org
X-Mailman-Version: 2.1.33
Precedence: list
List-Id: Networking and TCP/IP with FreeBSD <freebsd-net.freebsd.org>
List-Unsubscribe: <https://lists.freebsd.org/mailman/options/freebsd-net>,
 <mailto:freebsd-net-request@freebsd.org?subject=unsubscribe>
List-Archive: <http://lists.freebsd.org/pipermail/freebsd-net/>
List-Post: <mailto:freebsd-net@freebsd.org>
List-Help: <mailto:freebsd-net-request@freebsd.org?subject=help>
List-Subscribe: <https://lists.freebsd.org/mailman/listinfo/freebsd-net>,
 <mailto:freebsd-net-request@freebsd.org?subject=subscribe>
X-List-Received-Date: Wed, 21 Oct 2020 11:57:48 -0000

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