Multiple IP addresses
Posted on 2000-05-12
My requirement is to simulate a scenario
in which 2 machines are connected via
gateways accross an insecure network.
A --G1--<insecure net>--G2-- B
But the problem is that I have only two machines
available. One of them has 2 network cards which
I would be using to simulate the '2 gateways across
the net' (G1 and G2). But the other machine has just one network
card, but I would like to simulate it as the 2 'end-point'
machines (A and B).
So I tried cloning the eth0 (having address for A) with a different
IP address (for B, for a different subnet) and tried to
route the packets through the 'gateway' to the 'other' IP
address ('B') but apparently the kernel (or whatever) detects
that the 'remote' address is of the same host and the
packets are never transferred through the network card -
they are simply looped back.
Is it possible to configure the 'end-point' machine
such that it cannot detect it's own 'other' IP address
and is forced to route the packet to the specified