How to disable bots for site indexing?

Question

robots.txt

Is it possible to prevent site indexing from other sites / bots so as not to get backlinks from junk sites. Such as the top million sites in Alexarank and so on.

And how to make the site be able to index only specific bots, Google, Yandex, bing. For the rest, the site was closed.

Thanks for answers.

Answer 1

User-agent: Googlebot
Disallow: /nogooglebot/
User-agent: *
Disallow: /
but in practice this is not enough and you still need to block the left IPs from the logs