limit_req_zone in nginx.conf

gistfile1.nginxconf

http {

  ... # your nginx.conf here
  
  # Maps ip address to $limit variable if request is of type POST
  map $request_method $limit {
    default         "";
    POST            $binary_remote_addr;
  }
  
  # Creates 10mb zone in memory for storing binary ips
  limit_req_zone $limit zone=my_zone:10m rate=1r/s;

}