Please block the yandex search-engines:
0.0.0.0 yandex.com
0.0.0.0 yandex.com.tr
0.0.0.0 ya.ru
0.0.0.0 yandex.eu
0.0.0.0 yandex.lv
0.0.0.0 yandex.kz
0.0.0.0 yandex.ru
0.0.0.0 yandex.uz
(yandex.by has already been blocked)
For example if you type in your browser: "yandex.com" and type in the word "porn" and then click on tab video, you can show porn-videos as a preview directly in the yandex search-engine in full lenght.
Here an example-link: https://yandex.com/video/preview/6028407178255625934
Also if you click on the tab "images" you can show thousends of porn-pictures directly in the yandex search-engine.
With yandex.com you will find a huge selection of porn, much much more than other search engines.
I created this thread in case anyone asks about unblocking this search engines. So that it is clear why the search engines was blocked.