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 From:  "Brian McEntire" <brian dot mcentire at gmail dot com>
 To:  m0n0wall at lists dot m0n0 dot ch
 Subject:  How to 1:1 NAT WAN to OPT1?
 Date:  Wed, 24 May 2006 12:51:31 -0400
Looked at the docs and they say it is possible to 1:1 NAT WAN to OPT
but that you will almost always do it to LAN.

I want to leave the LAN interface unused except for admin'ing the Monowall.

What steps are needed to configure a 1:1 NAT like so:
  OPT1: 140.x.x.0/24

I'd like the OPT1 interface to get an IP address of 140.x.x.1 so that
hosts inside the OPT1 interface can use that as the default gateway.

Is proxyarp needed if 1:1 mapping an entire subnet?

Upstream of the monowall, is the interface on the router.