```
# cat /boot/loader.conf
net.inet.ip.fw.default_to_accept=1
net.inet.ip.fw.nat_hash=7
# kldload ipfw
# kldload ipfw_nat
# foreach i ( 1 2 3 4 5 6 7 8 9 10 11 12 )
> ipfw nat $i config ip 192.168.3.$i
> ipfw add nat $i ip from 192.168.1.2 to 192.168.2.$i
> end
# kldunload ipfw_nat
# kldunload ipfw
```
Loading and unloading should work.
Natting should work regardless of the nat_hash value.