Note: You may consider binding a secondary to one NIC that matches the new network segment for this configuration ahead of actual firewall configuration.
Step 1: Open a web browser and type the D-Link firewall into the address bar (default is 192.168.1.1). Press Enter.of the
Step 2: The default username is admin (all lower case) and the password is admin (all lower case). Click on OK.
Step 3: Click on the plus sign next to Objects, select Address Book, and then select Interface Addresses.
Step 4: Click on the lan_ip folder and edit the IP address as desired and then click OK.
Note: You will also need to change the lan subnet and DHCP client pool (Only if a DHCP server is enabled on the firewall) to reflect the new IP subnet.
Step 5: Click on the Configuration tab and select Save and Activate from the drop-down menu. Click on OK to save and activate your changes.
Note: The new LAN IP address will have to accessed within the validation timeout period. The default value is 30 seconds. To change the timeout period, click on the plus sign next to System, select Remote Management, and then select Advanced Settings. Change the Validation Timeout, and click OK.