peter green <plugw...@p10link.net> writes: > Disabling privacy extensions solved the issue but obviously reveals > the MAC address of my new machine to the world which is undesirable.
I have no solution to the problem with privacy extensions, but just wanted to let you know there is a third alternative for IPv6 autoconfigured addresses: stable-privacy This will give you addresses which are just as stable as the eui64 addresses, but derived from a configurable secret instead of the mac. The kernel part is documented in under 'stable_secret' in https://www.kernel.org/doc/Documentation/networking/ip-sysctl.txt If you use NetworkManager, then this is very easy to set up: Just set 'addr-gen-mode' to 'stable-privacy'. See the docs in nm-settings(5). Or if you use ifupdown and prefer to control it yourself, you can e.g. save the secret (in IPv6 address format) in some file and write it to /proc/sys/net/ipv6/conf/default/stable_secret on boot. This will set a common secret for all interfaces. Note that the generated interface ids still will be different, since the prefix is used as part of the input to the generator. Bjørn
