I think the morons from Google in their great wisdom managed to somehow bash one of the sites I’m hosting on a server and this shit ensued. 2 requests per second towards the homepage using an “?u=RANDOM_NUMBER” parameter. Where does it come from? No idea, maybe Google knows. Meanwhile, I pathed this easily with two lines:

index.php (but if you’re using Wordpress, put it in wp-config.php so it doesn’t get deleted on your next update)

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<?php 
	if(isset($_GET['u']) && ($_GET['u'] != '') ) {
		header('HTTP/ 429 Too Many Requests', false, 429);
		echo "Too Many Requests";
		exit;
	}
?>

robots.txt

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Disallow: /*?*u=*

Before you ask, yes, I triple checked the IP and it is actually Google’s.

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131.79.249.66.in-addr.arpa domain name pointer crawl-66-249-79-131.googlebot.com.