-->
-->  This is because active ftping relies on a secondary connection (that's
-->what the PORT command is for).  This connection is not translated by
-->ipnat.  You can compensate for this by prepending
-->
-->map le0 192.0.0.1/28 -> 0.0.0.0/32 proxy port ftp ftp/tcp


but isn't that the same as :
map le0 192.0.0.1/28 -> 0.0.0.0/32 proxy port 21 ftp/tcp

which is already at the bottom of my /etc/ipnat.conf

?!?!