It looks like in ios7 the URL that the device sends a request to to check whether it has an internet connection after connecting to wifi has changed (for the much worse!).

in ios6 and earlier,the request was :

```
GET /library/test/success.html HTTP/1.0
Host: www.apple.com
User-Agent: CaptiveNetworkSupport/1.0 wispr
Connection: close

```

([source](http://blog.erratasec.com/2010/09/apples-secret-wispr-request.html#.UjrIB2SgkW0))

But now in ios7, it can access 'upto 200' (according to [cisco](https://supportforums.cisco.com/docs/DOC-36528) ).

Having tested this myself, I can confirm the requests randomly go to appleiphonecell.com, captive.apple.com, airport.us, ibook.info among others. 

So my question is: Does anyone have a full list of these URLs (maybe it's just every domain Apple own)? We run a captive portal on our wifi, but just to let users know they need to connect to the VPN after connecting to wifi. Clicking 'cancel' on the captive portal log in page sometimes presents the option 'use without internet' which will then allow the user to connect to the VPN, but sometimes, clicking 'cancel' doesn't give this option, and just disconnects the wifi connection straight away, which then means the user can't connect to the VPN. 

Before we could just forge a response to the specific URL (library/test/success.html) which would then leave the wifi connected. We can do this again if we had a list of the sites it can access, otherwise we might have to go back to the drawing board with our captive portal! (Or await an ios7 update that fixes the option to 'use without internet' , which isn't appearing every time). Think we'll look into doing based on user agent for now if thats possible.

Edit-wee update, looks like UA is staying consistent at least with 'CaptiveNetworkSupport' being the common denominator, so we'll change to UA checking for the time being.