I have just recived a batch of Surface RT Tablets. As shipped these have Windows 8 RT as the OS This has IE10 as the browser.
This setup works fine with my Zerohell RC3 Captive portal.
I have now upgraded 1 of the tablets to Windows 8.1 this has IE11.
With this setup I am unable to get the browser to redirect to the Zeroshell Captive portal.
If I type the url of the Captive portal I get the login screen and can then login and access the Internet
If I add the address of my Captive portal to Trusted sites on the Surface RT the problem is cured. However this is not a very practical solution as the Captive portal is a BYOD network so needs to work for unmanaged devices.
Captive portal is using HTTPS with a certificate that is trusted by the Surface RT and the redirect is set to use CN.