>   As far as I know, /etc/sysconfig in FreeBSD is simply a script that
> is sourced by /etc/netstart that sets a bunch of shell variables.  It
> doesn't actually determine what the kernel is or is not capable of
> doing.
> 
>   I believe you'll need to rebuild your kernel.

You do _NOT_ have to rebuild your kernel to enable packet forwarding
with 4.4BSD-Lite and later -based kernels.

man sysctl(3) and sysctl(8), and note the parts about
net.inet.ip.forwarding.


cgd