The real setup is a bit more complex, but for the sake of this 
question I have two ethernet interfaces on the box, one to the real 
Internet with two genuine IP numbers and the other goes to an HP 
JetDirect interface on a printer at 192.168.0.2 (and nowhere else). 
I can't get another physical connection to the Internet, but I'd like 
it to look that way.

How do I get ipfilter or ipnat to just route the traffic?  Do I use 
map, bimap, or fastroute?  I tried rdr on the printer port and I had 
that working for a while, but without any icmp traffic.

I'd like my MacOS machine to be able to print to the JetDirect lpr 
interface as though it had a real direct network connection.

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h.b.hotz@jpl.nasa.gov, or hbhotz@oxy.edu