From mboxrd@z Thu Jan  1 00:00:00 1970
From: Andrew Beverley <andy@andybev.com>
Subject: Re: redundancy with Adsl modem
Date: Tue, 03 Jan 2012 07:14:14 +0000
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To: =?ISO-8859-1?Q?Usu=E1rio?= do Sistema <maiconlp@ig.com.br>
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On Mon, 2012-01-02 at 23:54 -0200, Usu=C3=A1rio do Sistema wrote:
> Hello everyone,
>=20
> I'm searching a way of the redundancy with my firewall CentOs Linux
> 5.5 that is behind from two adsl modem.
>=20
>=20
> well, I wish that when a link adsl comes down ( side from ISP line
> adsl no Ethernet cable that connects the modem adsl to my firewall )
> the traffic go to for other link adsl.
>=20
> there is any way to reach this redundancy with Linux iptables ??

I would recommend using LSM[1] and configuring that to run the relevant
iptables/iproute2 commands should an interface fail.

Andy

[1] http://lsm.foobar.fi/