On Mac OS X (tested on Leopard, might work on Panther/Tiger?
sudo ipfw add fwd 127.0.0.1,9030 tcp from any to me 80 in sudo ipfw add fwd 127.0.0.1,9001 tcp from any to me 443 in • If you just use an external NAT router as your firewall, you only need to do the port forwarding through that. Volunteers: please add advice for other platforms if you know how they work.