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kosamja

IPv6 is enabled in Debian. Will location and information leak happen when using IPv4-only config files?

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I am using Debian 11.4 with backported kernels and so on.

IPv6 is enabled in Debian. It means that when I am not using a VPN, I surf the internet with IPv4 and IPv6 enabled.

Now all my AirVPN config files are based on IPv4; none is based on IPv6.

Having said that,

1. When my machine is trying to connect to an AirVPN server using an IPv4 config file, will my location be leaked to the internet via IPv6?

2. When my machine is already connected to an AirVPN server using an IPv4 config file, will my location or sensitive data be leaked via IPv6?

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If the config doesn't set v6 routes, yes, IPv6 will talk to the clearnet, when connecting and during connection. What's worse is, your system will systematically prefer that connection, because IPv6 is. I strongly advise to not disable v6 but to route it through the tunnel instead.


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