Two internet connections, one firewall

[Andrea Ganduglia <nonews.org@gmail.com>]

I wonder if it is possible to have two internet connections running at
the same time on one box. Sure, one connection, one Eth

Schema:

        Router0 <---> Eth0 TUX Eth1 <---> Router1
                           Eth2
                            |
                            |
                           LAN (Hub)


Default gateway of LAN clients is Eth2, that have for gw Eth0.
In case Eth0  is down TUX (the firewall) which automatically onto Eth1.
Is it possible? And it is possibile using at the same time connections
on redundancy?




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