ipnat rdr question

[Aaron Jackson <jackson@negril.msrce.howard.edu>]

I am currently using ipnat to map my internal network to my isp connection.
Everything works fine, and it only took a few minutes to set up!  I now
want to allow X window connections to pass through and connect to my
power mac.  It would appear that I would need to use an rdr statement to
redirect the xdmcp port, but I don't really know how to go about doing
this. Although the documentation is very sparce, I did see an example
of an rdr rule on the ip filter home page:
rdr ed0 0.0.0.0/0 port ftp -> 127.0.0.1 port ftp
I've tried several variations of this rule, but have been unsuccessful.
Does anybody have any helpful hints out there?

Aaron Jackson		jackson@msrce.howard.edu