modem router + xr500 2 dhcp servers

[Buster]

Should the dhcp server be disabled on the modem/router or the xr500 router ? Trying something new and trying to avoid double NAT ( i dont have dmz on my modem/router )

[Netduma Fraser]

I wouldn't suggest disabling it on either, you could disable it on the hub if you give the XR500 a static IP on it first but otherwise it's not a good idea. It won't help you get an Open NAT. If it doesn't have modem or bridge mode and no DMZ then you should port forward 1-65535 TCP/UDP to the XR500 and make sure no devices connected to the hub and that'll be a make shift DMZ.