Howto enable IPv6 privacy extensions

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Hi all,

On an up-to-date F17 x86_64 box I was testing IPv6 and it was pointed out that the IPv6 address that Fedora uses is traceable because it ends in the MAC address of the nic. I don't like that and want to enable privacy extensions which should replace the MAC address with some random stuff in the IPv6 address.

I added the following to /etc/sysctl.d/ipv6_privacy_extensions and rebooted:

net.ipv6.conf.default.use_tempaddr = 1
net.ipv6.conf.default.temp_prefered_lft = 7200

Unfortunately this does not work as I don't see an IPv6 address with "scope global dynamic" and if I go to http://ip6.nl then it still shows my IPv6 address with the MAC address in it.

Anyone know how to make this work?

Thanks,
Patrick
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