We have captive portal setup in redirect mode. It's working fine for iPhones, iPads, Mac OS X, and Windows XP, but we are having problems with Windows 7 clients. They get a message that they need to authenticate before having Internet access, but when they go to a webpage I see the captive portal URL flash in the address bar, and then it goes back to the webpage and says the page cannot be displayed. Is anyone else having problems with Windows 7/Internet Explorer 8 and captive portal? I ran Wireshark and never saw the 302 redirect packet in the capture. The firewall log shows an incomplete session to the L3 interface for the Windows 7 client.
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