On Wednesday, February 20, 2019 at 2:00:06 PM UTC-8, [email protected] 
wrote:
> Hi All,
> 
> 
> Recently I noticed ipv6-test website can see tor browser’s ipv6 address
> 
> though it might not be necessaiyly my own ipv6, but that does somehow put me 
> on alart and to post a question at here,
> 
> I do see other people asked this question at stackexchange before, but I 
> don't quite get the answer for the question of mine.
> https://security.stackexchange.com/questions/193843/why-ipv6-showing-on-whatismyip-com
> 
> So I like to know if it's secure to check webmail thought tor, since if exit 
> node's ipv6 can be identified,
> there is a chance to track further back to other nodes as well.
> 
> you can say mac address can be changed, but it's not difficult to find out 
> the real one as well.
> 
> So should we use tor to check webmails? especially tor+VPN make it more 
> obviours on tor network, 
> does this make it actually wraker than just use firefox+vpn?
> 
> if you are a qubes user, what browser do you use to check w
>  ebmails?
> 
> really want know how you think, thank you

can you disable ipv6 or ipv6 forwarding in sys-whonix?

try sudo sysctl or echo into the right file in /proc/sys/net/ipv6/conf/all and 
either echo 0 > forwarding or 1 into disable_ipv6

hopefully that will working until upstream fixes it.

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