You can modify addresses in two ways using EzTools:
The "IP" button will allow you to manually program a IP address.
The "settings" button will allow you to toggle DHCP
When using the "IP" option, you must enter the New IP, Subnet Mask, and Gateway. Make sure to enter the correct username and password. The default is admin/123456
You will receive a confirmation that the modification was successful.
When using the "settings" method, you first be prompted to log into the device. Enter the credentials to the device and press OK.
"IP Obtain Mode" will allow to use Static, DHCP, or PPPoE addresses.
When using the "Static IP Address" option you may enter the IP address information in manually and "Save".
You will receive a warning prompting you that changing settings may cause network disconnection - confirm your IP address information is correct before pressing "Yes"