Asus AM604g - Manual (Page 31)

Firewall
IP Filtering—Outgoing
The outgoing filter will block the LAN traffic from entering the
WAN side. Click on the Add button to create filters.
The below screen will appear when you click on Add. Input the
filter name, source information (from the LAN side), and
destination information (from the WAN side). Then click on Save /
Apply.
ASUS 4-Port Wireless Ethernet Router
User Manual
30
Version 1.0
Document #: BD-AU0014-10