Is it possible to use regular expressions to check $http_referer?

Question

Nginx

A small flood is pouring onto the server, in the referee all sorts of crap like "5asdasd3fdas3.net", "4asdfas334.name" and so on. Is it possible to make a regular expression for this case? That is,
If ($http_referer contains more than one digit) {
return 444;
}

Answer 1

Regular can be used for any variable in if. If you need the regular expression itself for the “contains more than one digit” condition, then it looks something like this:

if ($http_referer ~ \d.*\d) {
  return 444;
}

Answer 2

It's better to save the IP where strange requests come from and ban them.

Answer 3

Instead of using the nginx.org/ru/docs/http/ngx_http_referer_module.htmlif ($http_referer module , it also allows regular expressions.