Whitelist sites on ASUS router, will dd-wrt help?

Question

System administration

Hello.
It is necessary by means of the Asus rt n11p and rt n12p router to restrict access to all sites except those allowed. I'm thinking of flashing on dd-wrt - are there similar possibilities there? I can not find.
Thank you.

Answer 1

You can manually: https://pastebin.com/FfevaYA3

Answer 2

there is
www.dd-wrt.com/wiki/index.php/Access_Restrictions