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iOS 11

NicholasHayman

Hi,

 

My college uses a captive portal web based authentication system on a Sophos UTM on their Wi-Fi. Since updating to iOS 11 when I connect it connects for a few seconds and gets a DHCP lease and then the connection just drops. Before I have a chance to login. They were able to reproduce the issue and said it's an iOS 11 issue then and I'd just have to wait for Apple to fix the bug. I don't think they're going to raise it with Apple or Sophos.

 

Has anyone had issues like this? I'd appreciate any input.



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  • 0

    We are experiencing exactly the same issue at multiple sites. All sites have Sophos SG430 UTMs with firmware 9.503-4.

    We have a Ruckus wireless and various WLANs for teachers, students and guests. Students connect to a password protected WLAN (WPA2 and TKIP+AES) and then connect to the internet via the Sophos captive portal authenticated via Active Directory.

    Students are able to connect to the WLAN but then the connection drops. A workaround is to set the proxy to automatic which by default is set to off in iOS11. Once this is set to automatic the wifi connection remains but after launching a browser students are not presented with the Sophos captive portal and they are unable to browse the internet.

    I will report this issue to Sophos support and provide some feedback.

  • +1 in reply to envercpt

    One important point to check if using SSL filtering, is to ensure that the Sophos site certificate is installed and ensure that it's trusted in the certificate store found under General, About within iOS 10 and up. While this wasn't an absolute necessity in the iOS 10 series, it seems this makes all the difference in the world with the latest iOS.

    I've also noticed that while you may have run through the certificate install in iOS 10.0, for example, in 10.3.3 or 11.0 the certificate is no longer trusted so you have to go into the certificate store. Or in other words the trusted certificate somehow becomes untrusted after a later update (and you need to trust it again).

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  • +1 in reply to envercpt

    One important point to check if using SSL filtering, is to ensure that the Sophos site certificate is installed and ensure that it's trusted in the certificate store found under General, About within iOS 10 and up. While this wasn't an absolute necessity in the iOS 10 series, it seems this makes all the difference in the world with the latest iOS.

    I've also noticed that while you may have run through the certificate install in iOS 10.0, for example, in 10.3.3 or 11.0 the certificate is no longer trusted so you have to go into the certificate store. Or in other words the trusted certificate somehow becomes untrusted after a later update (and you need to trust it again).

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