How to block Odnoklassniki application for wifi clients in OpenWRT?

Question

Network administration

There is a router on openWRT It is
necessary to block the work of the Odnoklassniki application on android and ios
To do this, I did the following
I went to the router via ssh, edited the hosts file, which is in the etc folder,
added the following addresses there:
1.1.1.1 ok.ru
1.1.1.1 www .ok.ru
1.1.1.1 https://ok.ru
1.1.1.1 https://www.ok.ru
1.1.1.1 odnoklassniki.ru
1.1.1.1 www.odnoklassniki.ru
1.1.1.1 https://odnoklassniki.ru
1.1.1.1 https://www.odnoklassniki.ru
1.1.1.1 m.ok.ru
1.1.1.1 www.m.ok.ru
1.1.1.1 https://m.ok.ru
1.1.1.1 https://www .m.ok.ru
There is no access from the browser, but everything is loaded from the application ..
Question: what addresses can the application still break into?
And is it possible to make it so that access is blocked only to certain mac addresses?

Answer 1

The application apparently does not use your dns or works through api, which is located at a different address

Answer 2

For normal blocking use iptables or privoxy