ipfilter nat failure

[Murray Thomson]

I am using a sun v210 with the pre-compiled binary of ipfilter for  
Solaris 9 - v 3.4.32-Sol9

When I set it up the NAT worked OK. Some complaints about it being  
slow. So I upgraded it to 4.1.9 and it won't nat. The packets go out  
to the internet untranslated.

It is going out over a ppp interface exactly like before. I ran into  
this with Sunscreen where it failed to translate over virtual (pppoe)  
interfaces.

Is there a known problem with newer version if ipfilter or is there a  
different way to make the configuration files that I am not aware of?

Murray