We are starting to deploy some iPad 3's in our production environment. By default, our corporate firewall blocks all websites, except for those that are approved for usage. I connected our new iPad 3 to our wireless and a message came up and said, "cannot connect to itunes store". This is acceptable, since these are production devices used for specific pre-loaded apps that we downloaded and installed via the PC.
However, I was wondering, if anyone knew what specific websites that a iPad goes out and checks in the background without the users knowledge, such as the iTunes store and iCloud for backup?