I am looking for information regarding advanced setup for the Archer BE550 router. This is a new router to us and does not have the typical setup menus and options that I have used in the past. We are continually running into issues where the router is blocking websites that we need to access. I am unable to find any whitelist for websites except within the parental controls. Which means I would have to put every device connected to our home network within a profile that supposedly would allow said access. Thing is that if it isn't going to allow the site to devices Not currently in a parental control profile, why would it allow access inside that profile either, which is my problem.

Is there anyway to allow access to a site to the entire network (home)? 

A good example today my son had to access the website Testmoz(dot)com for his drivers ed (a end of session test). Nobody on our network could access it except by using our cellphones over data. I tried my computer and phone, my wife's computer, tablet, and phone, my daughters computer and phone. And even after trying to add it to his profile (within the parental controls) it still could not be accessed. As a last ditch effort we enabled data access on our phones and disabled wifi (bypassing the router completely) and it finally worked.

This is the first time i have ever seen this lack of control within a router's settings. It is not the first time I have run into this problem but it is the first time I have combed through the tether app and the router access via connected computer looking for the solution to fix the problem. I am absolutely confused.

Can anyone offer me advice on what I might be missing and/or why the router would be blocking said website without explicit instructions to do so?

Thanks,

Kev

PS. yes I attempted a router reboot to no avail.