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 From:  "Chris Buechler" <cbuechler at gmail dot com>
 Cc:  m0n0wall at lists dot m0n0 dot ch
 Subject:  Re: [m0n0wall] Adding a second IP addresses to a NIC
 Date:  Wed, 17 May 2006 13:29:38 -0400
On 5/17/06, Paulo Meireles <paulo dot meireles at exxpert dot com> wrote:
> I'm sure this is obvious, but I'm new to both BSD and m0n0wall and
> couldn't find it on the documentation, despite having tried quite hard...
> I have built a firewall with 4 network interfaces. One of the interfaces
> is connected to a LAN that has 2 different subnets. I'd like m0n0wall to
> provide routing for these, but I can't figure how.

Using two IP subnets on the same broadcast domain is poor network
design and not supported in m0n0wall (or many commercial firewalls,
for that matter).

With that said, you'll find a work around here.