Blocking or allowing IP-addresses in Nginx

Nginx Config

server {
  listen 80;
  server_name kimtaek.github.io;
  charset utf-8;
  client_max_body_size 75M;

  location / {
    deny 192.168.1.1;      # Blocking specific IP
    allow 192.168.1.0/24;  # Your specific IP
    allow 10.1.1.0/16;
    allow 2001:0db8::/32;
    deny all;
  }
}