[NCLUG] configuring dual IP addresses, forwarding one to the other network card.

[Matt Kassawara]

You could mess with bridges... but why not just assign the IP address of
the printer to your Linux box and use tcpdump to see what's sending traffic
to it?


On Tue, May 27, 2014 at 11:27 AM, John Gilmore
<j.arthur.gilmore at gmail.com>wrote:

> I want to give my computer two IP addresses on eth1, and forward one
> of them transparently out eth0, in order to monitor network traffic to
> my printer.
>
> Script/suggestions? I figure one of you guys knows how to do this
> right of the top of your head.
>
>
>
> Situation:
>
> I've got a printer (hp color laserjet 2830) that's spewing out black
> pages. Continually. No computer in my part of the network has print
> jobs of any sort queued.
>
> I really need to figure out where this crap is coming from, but since
> I'm using a switch, I can't see the packets going to the printer, in
> order to finger the computer that's the culprit.
>
> My working theory is that one of the (windows) computers on the other
> half of the network (my brother's place) is infected with something.
>
> If so, I need a solid, irrefutable ID.
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