Blocked Sites Lists

I am trying to block sites on the routers, but it is a huge pain to add sites individually. I should be able to upload a pre-existing list of domains/keywords and have it block those sites, or at least be able to select categories to block, as that is how an enterprise grade level firewall/router works, as I have a little experience setting those up from studying IT. I even saw that other people were saying even after adding keywords, sites were not being blocked, which is rediculous. This really needs to be fixed, this is a pretty basic feature that is a must have.