I've been using CloudFlare with my azure web sites for a couple months. Yesterday my website started showing http 520 errors. After contacting CloudFlare support, it seems that Azure may be blocking the CloudFlare IPs (https://www.cloudflare.com/ips). I am able to connect to my site directly using the azurewebsites.net domain name but anything mapped via CloudFlare results in the 520 error. There's nothing in the azure error logs but the CloudFlare error logs seem to indicate that Azure is blocking the CloudFlare IPs. Anyone know the process of getting IPs whitelisted for Azure sites?