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Clarifications, VPN overview (#1825)

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docs/basics/vpn-overview.en.md
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@ -17,6 +17,12 @@ VPNs cannot encrypt data outside of the connection between your device and the V
However, they do hide your actual IP from a third-party service, provided that there are no IP leaks. They help you blend in with others and mitigate IP based tracking.
## When shouldn't I use a VPN?
Using a VPN in cases where you're using your [known identity](../basics/common-threats.en.md#common-misconceptions) is unlikely be useful.
Doing so may trigger spam and fraud detection systems, such as if you were to log into your bank's website.
## What about encryption?
Encryption offered by VPN providers are between your devices and their servers. It guarantees that this specific link is secure. This is a step up from using unencrypted proxies where an adversary on the network can intercept the communications between your devices and said proxies and modify them. However, encryption between your apps or browsers with the service providers are not handled by this encryption.
@ -43,7 +49,7 @@ VPNs cannot provide anonymity. Your VPN provider will still see your real IP add
Do not use that feature. The point of using Tor is that you do not trust your VPN provider. Currently Tor only supports the [TCP](https://en.wikipedia.org/wiki/Transmission_Control_Protocol) protocol. [UDP](https://en.wikipedia.org/wiki/User_Datagram_Protocol) (used in [WebRTC](https://en.wikipedia.org/wiki/WebRTC) for voice and video sharing, the new [HTTP3/QUIC](https://en.wikipedia.org/wiki/HTTP/3) protocol, etc), [ICMP](https://en.wikipedia.org/wiki/Internet_Control_Message_Protocol) and other packets will be dropped. To compensate for this, VPN providers typically will route all non-TCP packets through their VPN server (your first hop). This is the case with [ProtonVPN](https://protonvpn.com/support/tor-vpn/). Additionally, when using this Tor over VPN setup, you do not have control over other important Tor features such as [Isolated Destination Address](https://www.whonix.org/wiki/Stream_Isolation) (using a different Tor circuit for every domain you visit).
Thus, this feature should be viewed as a convenient way to access the Tor Network, not to stay anonymous. For true anonymity, use the Tor Browser Bundle, TorSocks, or a Tor gateway.
The feature should be viewed as a convenient way to access the Tor Network, not to stay anonymous. For proper anonymity, use the Tor Browser, TorSocks, or a Tor gateway.
## When are VPNs useful?