I actually have the same question.

I am about to setup a 1:1 bridge with monowall at a colocation center
and I've been given only a segment of a Class C. So my subnet is like
x.x.x.x/29 (not sure what 9 is, would have to look it up) so being
that its not the entire subnet, do i need to run proxy arp? I am not
even sure what proxyarp does... and when its needed.

Thanks in advance.

On 5/24/06, Chris Buechler <cbuechler at gmail dot com> wrote:
> On 5/24/06, Brian McEntire <brian dot mcentire at gmail dot com> wrote:
> >
> > I want to leave the LAN interface unused except for admin'ing the Monowall.
>
> that's fine, that'll work.
>
>
> >
> > What steps are needed to configure a 1:1 NAT like so:
> >   WAN: 10.0.0.0/24
> >   OPT1: 140.x.x.0/24
> >
>
> this is a bit confusing..  is your WAN IP really private, and you want
> to use a public IP subnet on OPT?
>
>
> > Is proxyarp needed if 1:1 mapping an entire subnet?
> >
>
> Depends.  If your ISP is routing that entire subnet to your WAN IP,
> no.  Otherwise, yes.  It typically won't hurt anything to use proxy
> ARP when you don't need it.
>
> -Chris
>
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