The Luma does not require to be in a DMZ (DeMilitarized Zone) to function with either a Modem/Router combination device or a another Router.
DMZ on a Modem/Router or Router can be used in certain circumstances in order to allow your Luma to be bypassed by the Modem/Router Firewall. In rare circumstances, we may recommend placing the Luma in your DMZ if you have limited control over your ports from a Firewall/Router perspective or if there is believed interference from your Firewall with respect to network traffic.
We are here to help with any configuration that you have! Please reach out to our support team at 800-684-LUMA or [email protected] as we are here to help!