Justin, this sample is for ASA 8.4(3)
Single port from Internet to single LAN IP
object network LAN-PC1
host 10.10.100.50
object-group service LAN-PC1-8000 tcp
object-port eq 8000
access-list incoming extended permite tcp any object LAN-PC1 object-group LAN-PC1-8000 tcp
object network LAN-PC1
nat (any,outside) static interface service tcp 8000 8000
In the single port forwarding if you want to forward different ports from the Internface outside IP, you have to create a single object group per port.
This sample is more that one port to a single internal IP
object network LAN-SERVER01
host 10.10.100.10
object network WAN-SERVER01
host 8.8.8.8
object-group service LAN-SERVER-01-PORTS tcp
object-port eq 25
object-port eq 80
object-port eq 443
access-list incoming extended permite tcp any object LAN-SERVER01 object-group LAN-SERVER-01-PORTS tcp
object network LAN-SERVER01
nat (any,outside) static WAN-SERVER01
In multiports to a single LAN IP, you have to set all ports in group for a single LAN IP.
I hope this help enough.
Regards.
Jos.