I'm trying to configure my Aiport Extreme so that it uses NAT Port Mapping. I tried following the instructions on http://support.herefilefile.com/entries/158222-enable-nat-port-mapping-protocol-on-airport-extreme.
In Airport Utility (version 5.5.3) however the two tabs DHCP and NAT seem to be missing.
How can I enable the NAT tab so I can enable NAT Port Mapping?