I was interested in this too, so I did some digging;

	http://www.macbsd.com/macbsd/howto/fwtk-faq.html

yacko
yacko@wildstar.net

On Sun, 23 Mar 1997, synapse wrote:

> >At 9:32 AM 3/18/97, Jason Greanya wrote:
> >>In the near future, I'm to be setting up my IIsi as a gateway machine
> >>for a small household network (~4 machines).  The connection to the net
> >>would be by ppp.
> >>
> >>I know that linux allows for ip masking when used as a gateway machine,
> >>does netbsd allow for this?  Are there any faqs concerning this subject?
> >
> >Check out the FWTK howto.
> >
> >Also it may work to assign local machines addresses on the 10.x.x.x network
> >since those addresses are not supposed to be advertised.
> >
> 
> I too am interested in such a feature. what is the address of the FWTK
> page, and what other information might i need?
> thanks a lot :)
>   - a
> 
>