How do I do NAT?

[Joaquin Menchaca]

Hi,

I wanted to set up FreeBSD 5.3 to do NAT.  Essentially, I'll have a 
permiter network and a private netowrk.  The private network will come 
out as a single IP on the permiter network: 192.168.1.3.

I was wondering where I would be begin to do this.  I had a fellow 
colleague and FreeBSD fan, and he suggested PF?  He said that this PF is 
the new exciting thing coming from OpenBSD.

Any thoughts...

  - joaquin