Needing some help with the r3 router

[blue water]

I'm running into some issues with the netduma router basically what's happening is the netduma is blocking a server that is inside of the radias I don't understand what's going on I have tried to factory reset it seems to not help the issue also after I do the factory reset and I get to the setup screen it will freeze on the screen that shows the continue button I then will have to unplug my isp router and plug it back in order to get past the continue screen for the setup