Sometime you want to block Googlebot to crawl your site. Googlebot user agent only have googlebot/2.1 or “Googlebot/2.1 (+http://www.googlebot.com/bot.html)”. Here are a simple snippet to block Googlebot using Nginx server. This block will redirect Googlebot and serve 403 response.
Put it in your location / directive or any location block of your root.
if ($http_user_agent ~ (googlebot) ) { return 403;}