From: Rick Jones <rick.jones2@hp.com>
To: Kelbel Junior <kelbel02@gmail.com>
Cc: netfilter@vger.kernel.org
Subject: Re: Source MAC address through bridged connection
Date: Thu, 19 May 2011 09:05:20 -0700 [thread overview]
Message-ID: <1305821120.8149.1094.camel@tardy> (raw)
In-Reply-To: <BANLkTikbqMrGCThuiFZRCtB6Mrf_+mcXNg@mail.gmail.com>
On Thu, 2011-05-19 at 12:52 -0300, Kelbel Junior wrote:
> Hi guys!
>
> I have the following scenario:
>
> Clients Network <------> Linux router <------> Mikrotik gateway
> <------> INTERNET
>
> Happens what the Mikrotik gateway controls the clients from the mac
> address (joining an ip to an MAC address) and when i put the linux
> router between they the control don't works.
> I saw on the MK(mikrotik) the packets coming in with the MAC address
> from the bridge, and this is a problem.
>
> Exist some way to preserve the source mac through a bridged
> connection, to continue seeing the mac address of the clients?
Is the device in the middle a router, or is it a bridge? The
distinction is quite important.
Conceptually, a router does it's thing at layer three of the (in)famous
seven-layer model (*). That means it only "preserves" layer three and
above. Layer 2 and below is not preserved.
A bridge (or (multiport)switch, ignoring marktroid-speak about "L3
switching") does it's thing at layer two. That means it preserves layer
two and above. Layer 1 (physical) is not preserved.
rick jones
* there is also the nine-layer model
http://www.isc.org/store/logoware-clothing/isc-9-layer-osi-model-cotton-t-shirt
next prev parent reply other threads:[~2011-05-19 16:05 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-05-19 15:52 Source MAC address through bridged connection Kelbel Junior
2011-05-19 16:05 ` Rick Jones [this message]
2011-05-19 16:11 ` Kelbel Junior
2011-05-21 12:47 ` Ed W
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