natd with several alias IPs

[Andrew Pantyukhin]

On 2/16/06, bob at a1poweruser.com <bob at a1poweruser.com> wrote:
> I am not sure just what you are asking about.
>
> Are you saying that you have 4 static public ip address assigned to
> you by your ISP and you want to round robin those 4 in the NATing
> process to your hundreds of LAN users?
>
> If that's what you are after then any of FreeBSD's 3 built in
> firewall can do that by how you code the NAT statements.  Read the
> handbook firewall ipfilter section for details. There is no special
> tricks or need for several NATed process.

I'm quite aware of the fact that both pf and ipf have
mature nat frameworks. The question is, how to do
that with natd (and ipfw). Could you be so kind and
throw an example of a round-robin setup without
several natd processes, 'cuz I can hardly imagine
that?