Use a separate hub/switch for the connection between the Linux box and the
router.
Of course, if the IPs of the interface to the router is on a different
network (numerically), this often has the same effect.
Router has an IP of 192.168.0.1, linux-eth0 has an IP of 192.168.0.2
Linux-eth1 has an IP fo 192.1681.1., PC#1 is 192.168.1.2, PC#2 is
192.168.1.3, PC#3 is 192.168.1.4.
The same could work in the next diagram:
PC#1
/
Router--hub<---eth0-linux
|\
| PC #2
PC#3
In this case, eth0 would have an IP of 192.168.0.1, and eth0:0 (Virtual
interface) would have an IP of 192.168.1.1.
However, if you don't want the router to have any chance of seeing traffic
from PC#1, PC#2 or PC#3 on the same physical ethernet segment, the first
example is the better way to go.
On Tue, 6 Mar 2001, Sergio Pereira wrote:
> Hi folks,
> I have a linux box (Redhat7) with 3 interfaces working as router.
> How can I make sure that all traffic are passing through my linux box ?
> Actualy I don't want that cisco router see my network ... just my
> linux box. How can I do that without touch on cisco router ?
>
> thanks a lot
>
> sergio
>
>
>
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