Updating the Firmware
The Firmware Update page appears.
3. Click Browse.
A browse window appears.
4. Select the image file and click Open.
The Firmware Update page reappears. The path to the firmware update image file
appears in the Browse text box.
5. Click Upload.
Your NetDefend firewall firmware is updated.
Updating may take a few minutes, during which time the PWR/SEC LED may
start flashing red or orange. Do not power off the appliance.
At the end of the process the NetDefend firewall restarts automatically.
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D-Link NetDefend firewall User Guide