All VPN solutions we have previously covered had one thing in common: they include open-source implementations, which should be easier to check for vulnerabilities. However, in reality, there are other issues and peculiarities, besides those contained in the code.
The most obvious problem is the occasional disconnect of VPN which, consequently, all of a sudden, routes the traffic through a public network. For instance, it may well happen when a user is connected to a public Wi-Fi network or any other available mobile network. The worst case is when the user is not notified of that and the VPN connection is not re-established automatically.
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