$_SERVER['REMOTE_ADDR'] = 54.221.29.4
gethostbyaddr($_SERVER['REMOTE_ADDR']) = ec2-54-221-29-4.compute-1.amazonaws.com

$_SERVER['HTTP_X_FORWARDED_FOR'] = 
gethostbyaddr($_SERVER['HTTP_X_FORWARDED_FOR']) = 
$_SERVER['HTTP_VIA'] = 

$_SERVER['HTTP_USER_AGENT'] = CCBot/2.0 (http://commoncrawl.org/faq/)