In other words, you might expect a VPN client to kill existing connections before establishing a secure connection so they can be re-established inside the tunnel. But iOS VPNs can’t seem to do this, Horowitz says, a finding that is backed up by a similar report from May 2020. “Data leaves the iOS device outside of the VPN tunnel,” Horowitz writes. “This is not a classic/legacy DNS leak, it is a data leak. I confirmed this using multiple types of VPN and software from multiple VPN providers. The latest version of iOS that I tested with is 15.6.”
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