[NTLUG:Discuss] Solutions for a 'Transparent Bridge'

[David Simmons]

It seems like you're missing part of the discussion....your 'on-board' nic
must be eth0....how are you using that?

> Howdy,
>  
I setup a system like this and I think it will do what you want.  I
> used one of the dual port nic cards and added it to a system with
an
> onboard nic.  I made the transparent bridge from eth1 and
eth2, so I
> made the appropriate adjustments to his commands. 
After that, I plugged
> the two ethernet ports inline with my
internet connection and ran
> wireshark to monitor br0.  It is
showing all traffic to my lan from the
> internet and back.  It
also shows all broadcast traffic on my lan.
> 
>  
Modified list of commands
> brctl addbr br0
> brctl addif
br0 eth1
> brctl addif br0 eth2
> ifconfig eth1 down
> ifconfig eth2 down
> ifconfig eth1 0.0.0.0 up
>
ifconfig eth2 0.0.0.0 up
> ifconfig br0 10.0.3.129 up
>
echo "1" > /proc/sys/net/ipv4/ip_forward
> route add
default gw 10.0.3.129
> 
>  If you want to borrow this
system for a few months, that would be fine.
> It is a fairly
small system.
> Good luck,
> Ralph
> 
> On
Fri, 2009-01-23 at 23:22 -0600, David Stanaway wrote:
>> David
Simmons wrote:
>> >
>> >
>> >
Anyone out there running a transparent bridge and care to
>>
> share
>> > their hardware/software setup with me?
>> >
>> > What I want
>> > to do is
be able to log/watch ALL TCP/IP traffic coming from my
>>
internet
>> > connect to my network....would prefer sometype
of aggregated log
>> > summaries.
>> >
>>
>> I used this setup with good success
>>
>>
http://tldp.org/HOWTO/Ethernet-Bridge-netfilter-HOWTO.html
>>
>> Been a while since I set it up though, and I
can't share configs
>> unfortunately.
>>
>> I used onboard Dell broadcom gigabit ethernet in poweredge
servers and
>> Debian.
>>
>>
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>>
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> 
>