Set Service Providers to be "untrusted" in Shield Security

functions.php

<?php

/**
 * Use this filter to tell Shield to NOT automatically whitelist certain providers.
 *
 * By default Shield will never block official service providers and web crawlers. You can turn off this behaviour on
 * a per-service basis using this filter.
 *
 * Understand that Shield doesn't then "block" the provider, it simply no longer gives it a free pass. If it abuses your
 * resources or performs requests that cause offenses, it may be then blocked by Shield.
 *
 * For example, you may find a particular webcrawler abuses your resources repeatedly. Let's say the web crawler in question
 * is the Huawei / PetalBot crawler. This example demonstrates how to turn off automatic whitelisting for this crawler.
 *
 * To find the full list of recognised Crawlers, please see this URL:
 * https://wphashes.com/api/apto-wphashes/v1/services/provider_ips
 *
 * From the JSON, use the "key" for each crawler/service provider in the filter function.
 *
 * We've provided a few here as examples, but please only specify the ones you want to "un-bypass".
 */
add_filter( 'shield/untrusted_service_providers', function ( $providers ) {

	$providers[] = 'huawei';
	$providers[] = 'bing';
	$providers[] = 'baidu';
	$providers[] = 'yandex';

	// ALWAYS return $providers.
	return $providers;
} );