ICMP NAT, ICMP echo response from proxy ARP NAT?

From:	Steven McCoy <fnjordy at gmail dot com>
To:	m0n0wall at lists dot m0n0 dot ch
Subject:	ICMP NAT, ICMP echo response from proxy ARP NAT?
Date:	Sun, 23 Oct 2005 14:24:54 +0800

Is this a limitation of the current implementation of NAT in m0n0wall, or
something I am doing wrong? If I have proxy ARP set so that m0n0wall has
four WAN side IPs, and I enable incoming ICMP I can ping on the primary
address, but all the others return "no route to host". Ideally I would like
the choice of either responding to all ICMP queries from m0n0, or being able
to route to various internal hosts.

thanks

--
Steve-o