two router setup

[DayDaysTech]

my home router is a custom router running untangle firewall i have about 30 devices and want to use that as my main router. how would i go about setting up my netduma router as a 2nd router if there isnt AP mode on the router and connect my gaming pc to it

[Netduma Fraser]

There isn't anything special you need to do on the R2, you would just connect it to that router and it would work. The trouble I assume would come when trying to get devices behind the R2 to have an Open NAT if you have loads of upstream firewall rules as using the DMZ on it for the R2 might stop your other devices working as well but you could try it. Ideally though the R2 is meant to be used as the main router.