In a new support document, Apple informs iOS users that on devices running iOS 6.1 and later, the behaviour of VPN on Demand will soon be altered via a software update due to a lawsuit by Internet Security company VirnetX.
From the support document:
Due to a lawsuit by VirnetX, Apple will be changing the behavior of VPN On Demand for iOS devices using iOS 6.1 and later.
Devices using iOS 6.1 and later with VPN On Demand configured to “Always” will behave as if they were configured with the “Establish if needed” option. The device will establish a VPN On Demand connection only if it is unable to resolve the DNS name of the host it is trying to reach. This change will be distributed in an update later this month.
Virtual Private Networks are mostly used by corporate users to access a private company network securely over the Internet. In the support document, Apple describes various scenarios where this change could result in problems for VPN users, including ones where the server is configured to deliver different content over internal and external networks.
To address these issues, the user needs to manually turn on VPN in Settings, or wait until Apple delivers a solution in a future software update.
Via: The Loop