I've got a linux server as gateway/firewall between my private network and the internet. Your kernel must be compiled with firewalling enabled and ip-portforwarding.
Then you can use the following command to forward ip-traffic from the firewall to your empeg :

ipmasqadm portfw -a -P tcp -L <internet ip-address of firewall> <portnumber> -R <ip-address of your empeg> <port of displayserver>

example:
ipmasqadm portfw -a -P tcp -L fvgestel.dyndns.org 13470 -R 192.168.12.2 80



Frank van Gestel
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Frank van Gestel