As I notice more often with FreeBSD, there are always plenty of ways that lead to some specific goal.
After figuring out which firewall I wanted (I choose ipfw) I now am completely insecure about which way to do Network Address Translation (NAT).
As I have discovered now, there are two ways to to NAT, I could use the kernel space
ipfw nat or I could use the userspace
The only one of these described in the FreeBSD handbook is
What I would like to know is what the main differences are between these? Which one is more popular.
Off course I would also like to be able to fish, so how I can find out these differences in the manuals/handbooks?