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Date:      Thu, 09 Apr 2009 12:12:28 -0400
From:      Lowell Gilbert <freebsd-questions-local@be-well.ilk.org>
To:        Frederique Rijsdijk <frederique@isafeelin.org>, freebsd-questions@freebsd.org
Subject:   Re: combining network interfaces
Message-ID:  <44y6u96c2b.fsf@be-well.ilk.org>
In-Reply-To: <49DE13D9.2070601@streamingedge.com> (Jacques Manukyan's message of "Thu\, 09 Apr 2009 11\:27\:21 -0400")
References:  <49DE11C2.90503@isafeelin.org> <49DE13D9.2070601@streamingedge.com>

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Jacques Manukyan <mlfreebsd@streamingedge.com> writes:

> Frederique Rijsdijk wrote:
>> Hello,
>>
>> Is there a way in FreeBSD to combine a number of network interfaces to
>> one virtual interface on which I can tcpdump all the traffic of those
>> interfaces at once?
>>   
>
> You're talking about bridging. Look at
> http://www.freebsd.org/doc/en/books/handbook/network-bridging.html
>
> Section 31.5.7.1 is what you're asking for.

I don't think he wants to forward the traffic between those interfaces,
though; just dump them all together.  I'm not sure, though.

If I'm right, I don't think tcpdump can do that directly.  One idea
might be to run a firewall to choose the packets and to forward a copy
to a dummy interface that can be monitored.
-- 
Lowell Gilbert, embedded/networking software engineer, Boston area
		http://be-well.ilk.org/~lowell/



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