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 From:  Chris Buechler <cbuechler at gmail dot com>
 To:  Steve Yates <steve at teamits dot com>
 Cc:  "m0n0wall at lists dot m0n0 dot ch" <m0n0wall at lists dot m0n0 dot ch>
 Subject:  Re: [m0n0wall] RE: Upgrading 1.2 to 1.3
 Date:  Fri, 16 Jul 2010 21:49:26 -0400 
On Fri, Jul 16, 2010 at 9:44 PM, Steve Yates <steve at teamits dot com> wrote:
> Steve Yates wrote on Fri, Jul 16 2010 at 7:37 pm:
>
>> I think I will try 1.3 again but use 1:1 NAT instead of
>> bridging and OPT1.
>
>        Well that fails spectacularly too.  When I enable 1:1 NAT using a public IP as the
external, and a private IP as the internal, all communication past the ISP's router seems to stop.
>

Likely ARP cache on the ISP's router, and/or missing proxy ARP.