Is anyone else having this issue? We are having issues with iPads/iPhones running IOS6 connecting to our guest wireless. Once they get connected, usually by powering off/on the device, they work fine for the rest of the day. However, when they come back in the next day they have the same issue.
Obviously this appears to be an Apple issue, since it seems to only be IOS6 and is temporarily resolved by powering off/on the device, but we see something very strange when doing a packet capture on the AP or controller.
When doing a packet capture, I see the IOS device attempt to go to the website www.apple.com/library/test/success.html. It uses this site to determine if it can get to the Internet, or if there is a captive portal involved. Since we are running a captive portal and the user is not authenticated, the controller should intercept the three-way TCP handshake initiated by the IOS device and then should send a http 302 redirect to the captive portal page. When everything is working properly, that is exactly what happens. But when the IOS device is not able to connect properly, the packet capture shows the IOS device sending a TCP SYN packet. The controller however doesn't intercept it and respond with a SYN/ACK, it just ignores the packet.
So while this appears on the surface to be an IOS6 issue, packet captures tells a different story. The IOS device is attempting to connect to the web page as it always does, but the controller is not responding properly. We have a case open with Aruba, but have not had any success getting it resolved, or getting an explanation why the controller is not responding properly.