trying to configure ipnat, and found that I can crash my system
reproducably.

Created an /etc/ipnat.conf:

map ppp0  192.168.80.0/24 -> 0/32 proxy port ftp ftp/tcp
map ppp0  192.168.80.0/24 -> 0/32 portmap tcp/udp 40000:60000
map ppp0  192.168.80.0/24 -> 0/32 

---
and then issue a :
ipnat -f /etc/ipnat.conf

and it dies everytime.  did a little looking and learned that ip_proxy.c
1.17, had a problem with the the 'ftp' side of
it, so i got an 'in progress' 1.18, and it still crashes.

I can't post the crash message, because, quite frankly, I'm too new to net
to know how to extract it.
But, looking for some kind of resolution.
open to suggestions.

thanks,