Bloking Bad bots

[debilish99]

Hello,

I have a server with several domains, in the configuration file of each
domain I have a line like this to block bad bots.

If ($ http_user_agent ~ *
(zealbot|MJ12bot|AhrefsBot|sogou|PaperLiBot|uipbot|DotBot|GetIntent|Cliqzbot|YandexBot|Nutch|TurnitinBot|IndeedBot)
Return 403;
}

This works fine. 

The question is, if I increase the list of bad bots to 1000, for example,
this would be a speed problem when nginx manages every request that
arrives.

I have domains that can have 500,000 hits daily and up to 20,000 hits.

Thank you all.

Greetings.

Posted at Nginx Forum: https://forum.nginx.org/read.php?2,270930,270930#msg-270930