Asus AM604g - Manual (Page 58)

To assign the IP address of the management station that is
permitted to access the local management services, enter the IP
address in the box and click on the Save / Apply button.
Passwords
Access the Passwords screen under the Access Control section
to change a password. Select an account and enter the current
password and the new password and then click on the Save /
Apply button.
ASUS 4-Port Wireless Ethernet Router
User Manual
57
Version 1.0
Document #: BD-AU0014-10