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Cloning the MAC address will insure that you can connect through your modem in the event that the MAC address, or physical address, of your network card has been registered with your ISP.
Cloning the MAC copies the MAC address of your ethernet card to the WAN port of the DI-704. In other words, it will appear to your ISP will that it is your computer connected to the modem, not the gateway. That is why it is necessary to configure the DI-704 from the same computer that was originally setup with your modem. Otherwise, the gateway may copy the wrong MAC address to the WAN port.
From the Device Information page, click on the Tools menu option at the bottom of screen. This will take you to the Useful Tools menu. Click the Clone MAC button, then click OK when prompted to "Change MAC address right now?".
New MAC address will take effective after rebooting! will be displayed and the Clone MAC button will change to a Restore MAC button.
Click the Reboot button, then click OK when prompted to "Reboot right now?". This will take you back to the Device Information page. Click the Logout button and then close your browser.
Step 7 Power down the DI-704. Either turn it off from the power switch, or unplug the AC power cord from the gateway. With the DI-704 turned off, recycle the power on the cable modem. Again, turn it off it has a switch or just unplug it from the wall outlet. Wait 30 seconds and then power up the modem only. Wait until all of the lights on the modem have stabilized. After you are sure that the modem has stabilized, power up the DI-704.
Step 8 At this point you should be able to open your browser and browse the Internet. If you are using special applications through the gateway, you may need to open ports in the Virtual Server or Special Apps configuration menus.