A great feature I came across recently where we can limit dynamically limit IP addresses based on Request Rates and other aspects of the Requests.

http://blogs.msdn.com/b/windowsazure/archive/2013/08/27/confirming-dynamic-ip-address-restrictions-in-windows-azure-web-sites.aspx

IIS 8 and above :)


Blog Post by: Mick Badran