Inbound ping fails as soon as I ping out to that host

From:	"Tim Vaughan" <talltim at gmail dot com>
To:	m0n0wall at lists dot m0n0 dot ch
Subject:	Inbound ping fails as soon as I ping out to that host
Date:	Mon, 24 Jul 2006 12:05:45 +0100

Hi,

This doesn't appear to cause any unwanted effects so it's more of a
curiosity at the moment.  I've found that if, while pinging an
external host, I send a ping from that host to my m0n0wall, the ping
fails and I don't get a reply until I stop for some time.  When I
check the logs, I see that my m0n0 has been blocking all the dropped
pings.  Why is this?  Is it a consequence of NAT?

Cheers,

Tim