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cloning traffic with iptables


From: dninja at gmail.com (Robin Wood)
Date: Tue, 6 Jan 2009 17:54:13 +0000

2009/1/6 Sam Buhlig <sbuhlig at gmail.com>:
One of the guys in my 2600 group has a nice little solution that I am going
to test at home. Here is a link to his presentation that he made.

 http://cinci2600.com/?fuseaction=download.go&id=29

Shows how to make a passive ether tap.

That is what I'm trying to do but I think the difficulty I'm having is
spitting the data out through the wireless interface rather than
wired. Something I noticed that someone else mentioned in passing was
interface bonding, I haven't heard of that so I'll have to look into
it, I just assumed they were talking about bridging last time.

Robin


Here is some other cool presentations that can be downloaded.

http://cinci2600.com/?fuseaction=download.show

SamIAm

On Tue, Jan 6, 2009 at 9:06 AM, Mike Patterson <mike.patterson at unb.ca>
wrote:

Robin Wood wrote on 1/6/09 4:23 AM:
2009/1/6 Don Berry <don_berry at comcast.net>:
Do it upstream on the network interfaces. Use the switch that the
interface
is connected to and do port mirroring or cloning.

I'm designing a device which can be dropped onto any point of a
network to sniff traffic so need the device itself to do it.

Am I being simple, or is what you want just a bridge?  I did this with a
FreeBSD box, just bridged em0 to em1 and sniffed on the bridge device.
No reason you shouldn't be able to do something similar with iptables,
no?  (Of course, I hate iptables, which is why it was a BSD box and not
a Linux box, but I digress.)

Mike
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