On 13 Jan 2012 13h36 WET, nginx-forum@nginx.us wrote:

> Hello,
>
> Is there a chance to limit robots to 1 request per second?
> The down below does not work: [emerg] "limit_req" directive is not
> allowed here

Yes. Try:

At the *http* level:

limit_req_zone $http_user_agent zone=useragenttrack:1m rate=1r/s;

map $http_user_agent $is_bot {
default 0;
~[a-z]bot[^a-z] 1;
}

At the server level:

location / {
error_page 418 @bots;

if ($is_bot) {
return 418;
}
...
}

location @bots {
limit_req zone=useragenttrack burst=100 nodelay;
...
}

Cf: http://wiki.nginx.org/HttpLimitReqModule

--- appa

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