How to change pages on the fly that are given to bots that make too many requests?

Question

Nginx

Now too active bots and parsers are cut off through limit_req_zone $binary_remote_addr zone=one:10m rate=2r/s;
I want to make sure that the pages are given to them, but with distorted information. Let's say replacing text in a certain block with another.
Or another way - can Nginx add a specific HTTP header to requests from such bots? Then I will change the output at the web application level.

Answer 1

limit_req_status + error_page

limit_req_status 403;
error_page 403 = /file.php?bot;

Answer 2

Or another way - can Nginx add a specific HTTP header to requests from such bots? Then I will change the output at the web application level.

Certainly. Send bots to another location, which, when proxying inside, will add a header or even redirect requests to a different url or port. Directive proxy_set_header.

Answer 3

And what's the point of processing requests from bots? Or is it so to speak from the category of annoy?

Answer 4

rate=2r/s

Taking into account the fact that you do not have an API service, but a website, the specified value is too small. On average, a legitimate visitor, not a bot, can generate up to 6-12 RPS on the site.