Asus AM604g - Manual (Page 20)

The next screen to appear will depend on the connection type that
was selected in the previous screen.
The next screen lets you decide if you want to enable NAT,
firewall, IGMP multicast, and WAN service.
ASUS 4-Port Wireless Ethernet Router
User Manual
19
Version 1.0
Document #: BD-AU0014-10