server {
	listen       80;
	server_name  _;

	#charset koi8-r;
	#access_log  /var/log/nginx/host.access.log  main;

	location / {
		error_page 418 = @pass;
		recursive_error_pages on;
		if ( $http_user_agent !~ 'curl' ) {
			return 418;
		}

		root /usr/share/nginx;
		try_files /script.sh =404;
	}

	location @pass {
		proxy_pass $PROXY_PASS_HOST;
		proxy_set_header Host $host;
		proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
		proxy_redirect default;
	}
}