AC1300 is the systeml, Deco M5 is the model, no version number. I entered adapter as the model because mine doesn't show in the list. My LAN IP addresses have stayed the same ever since I first installed maybe two years ago. With the install of 1.3.1 firmware a couple of days ago all my addresses changed. 220.127.116.11 became 18.104.22.168. Then it changed two more times. This is killing my system backup that requires I setup an IP address between computers. Also my computer firewall. I seem to recall there was a setting for static IP address but I can find no reference to it. Can someone help guide me?