combining network interfaces

[Lowell Gilbert]

Jacques Manukyan <mlfreebsd at 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/