well i've tried it but the forwarding just doesnt work .. i see entries when i set packet inspection on but nothing arrives on my destination machine.
I might try the upgrade first .
Have you configured a firewall rule to allow the traffic through?
If you are filtering by destination you need to use the internal ip.
The NAT defines the mapping between the internal and external Ip address however the traffic will still pass through the packet filter and therefore will need appropriate rules to be configured on the incoming interface. ;)
Hope that helps.