Block Roblox on router

[#1]

I’m looking to block the Roblox app via my router. Looking at the firewall page I get the attached screen grab. Does anyone know which port settings I need to enter?

Also, how would I block Roblox.com?

[#2]

I doubt you'll be able to do that way, you'd be better off trying to find the domains that roblox uses and block it in safe guard.

Or use parental controls to limit time on the app or just uninstall it!

[#3]

I’ll have to try and block the website then.

I’ve tried the other methods you’ve mentioned but he reinstalls. I can’t begin to go into the battles we’ve had over it. Suffice to say that they are many. 

Thanks.

[#4]

Not sure what phone you have but with iPhones my lot have to request the app before they can install it.